Horse Gestation Calculator - Foaling Date & Pregnancy Tracker

Calculate your mare's estimated foaling date, track pregnancy progress by trimester, and view important milestones throughout the 340-day gestation period. Enter the breeding date to get started.

How Long Are Horses Pregnant?

The average gestation period for a horse is approximately 340 days, or roughly 11 months and 6 days. However, this number is only an average -- perfectly healthy pregnancies in mares can last anywhere from 320 to 370 days. The most common normal range is considered to be 330 to 345 days, with the vast majority of foals being born within this window.

Several factors can influence the exact length of a mare's pregnancy:

Breed: Larger draft breeds tend to carry their foals slightly longer than lighter breeds. Thoroughbreds and Arabians may foal somewhat earlier than Clydesdales or Percherons. Ponies often have shorter gestation periods compared to full-sized horses.
Season of conception: Mares that conceive earlier in the year (late winter or early spring) tend to carry slightly longer than those bred in the peak summer months. This is believed to be related to photoperiod (day length) and the mare's natural reproductive rhythm.
Sex of the foal: Colts (male foals) are statistically carried an average of 2-7 days longer than fillies (female foals), though this is not a hard rule.
Individual variation: Just like humans, each mare has her own pattern. A mare that consistently foals at 335 days is perfectly normal, as is one that regularly goes to 350 days. First-time mothers (maiden mares) may carry slightly longer than experienced broodmares.
Nutrition and health: A well-nourished mare with optimal body condition tends to have more predictable gestation lengths. Poor nutrition or underlying health issues can sometimes cause preterm delivery or extended gestation.
Environmental stress: Extreme weather, transport, herd changes, or other stressors can occasionally affect gestation length, although mares are generally resilient in this regard.
Twins: Twin pregnancies in horses are rare and often managed by veterinarians (one twin is usually reduced early on). If a twin pregnancy is carried, gestation may be shorter and the foals smaller.

It is important to remember that a foal born before 320 days is generally considered premature and may require intensive veterinary care, while a pregnancy extending beyond 360-370 days warrants close veterinary monitoring to ensure the health of both the mare and foal.

Breed-Specific Gestation Averages

The following table provides general averages for common horse breeds. Keep in mind these are approximations, and individual mares may vary significantly.

Breed / Type	Average Gestation (Days)	Typical Range (Days)
Thoroughbred	340	330 - 345
Quarter Horse	340	332 - 346
Arabian	338	330 - 342
Standardbred	340	330 - 346
Warmblood	342	335 - 350
Paint Horse	340	330 - 345
Appaloosa	340	332 - 346
Morgan	340	330 - 345
Draft Breeds (Clydesdale, Percheron, Shire)	345	335 - 360
Pony Breeds (Welsh, Shetland, Connemara)	335	325 - 340
Miniature Horse	330	320 - 340
Friesian	343	335 - 350

Horse Pregnancy Stages

A mare's pregnancy is typically divided into three trimesters, each lasting roughly one-third of the 340-day gestation period. Understanding what happens during each stage helps breeders and owners provide appropriate care and know what to expect.

First Trimester (Days 0 - 114)

The first trimester is the period of initial embryonic development and establishment of the pregnancy. It is a critical time during which many natural pregnancy losses occur.

Days 0-2: Fertilization occurs in the oviduct. The fertilized egg (zygote) begins dividing as it travels toward the uterus.
Days 5-6: The embryo enters the uterus as a blastocyst.
Days 6-16: The embryo is mobile within the uterus, moving freely throughout both uterine horns. This mobility is essential for maternal recognition of pregnancy, signaling the mare's body not to release prostaglandin, which would end the pregnancy. This is why veterinary ultrasound examinations are typically scheduled at 14-16 days post-breeding.
Day 17: The embryo becomes fixed in position, typically at the base of one uterine horn.
Day 21-25: The heartbeat is first detectable by ultrasound. A follow-up scan is often performed at this time to confirm viability.
Day 25-35: The embryonic vesicle grows rapidly. The endometrial cups begin forming, which produce equine chorionic gonadotropin (eCG), a hormone critical for maintaining pregnancy.
Day 40-45: The embryo is now considered a fetus. All major organ systems have begun forming. Another ultrasound check is often performed to detect twins (if not previously resolved).
Day 55-70: Sex determination of the fetus becomes possible via ultrasound at approximately 60-70 days. The fetus migrates from its initial position and the genital tubercle moves to its final location, allowing a skilled practitioner to identify the sex.
Days 80-114: The fetus is about 15-20 cm (6-8 inches) long by the end of the first trimester. The limbs, hooves, and basic body shape are visible on ultrasound. The placenta is forming and the umbilical cord is well-established.

The first trimester has the highest risk of pregnancy loss. Studies suggest that 10-15% of equine pregnancies are lost during this period. Most losses occur before day 40. For this reason, veterinarians recommend multiple pregnancy checks during the first trimester.

Second Trimester (Days 115 - 226)

The second trimester is generally the most stable period of pregnancy. The risk of miscarriage decreases significantly, and the fetus grows steadily.

Days 115-150: The fetus grows rapidly. By day 150, it is approximately 30-40 cm (12-16 inches) long and weighs several pounds. The hair coat begins to develop, and the mane and tail start to form.
Days 150-180: The fetus's organs continue to mature. The skeletal system is ossifying (bone is replacing cartilage). The mare's abdomen may begin to show visible enlargement, though this varies significantly between individuals and is more noticeable in maiden mares.
Days 180-200: The fetus weighs approximately 10-15 pounds and is beginning to look like a miniature horse. Fetal movement may become detectable, particularly in thin or fit mares.
Days 200-226: By the end of the second trimester, the fetus is about 50-60 cm long. The mare's nutritional demands begin to increase as fetal growth accelerates. This is when many breeders begin adjusting the mare's feeding program to account for the growing foal.

The second trimester is often called the "maintenance phase" because the mare's needs remain relatively stable compared to the demanding third trimester. Routine care including regular farrier visits, moderate exercise, and standard deworming protocols should continue.

Third Trimester (Days 227 - 340)

The third trimester is the period of most rapid fetal growth. Approximately 60-65% of the foal's total growth occurs during the final three months of pregnancy. This places significant nutritional and physical demands on the mare.

Days 227-270: The fetus grows dramatically. The mare's abdomen becomes noticeably larger. Nutritional requirements increase substantially -- the mare may need 1.5 to 2 times her normal caloric intake by the end of pregnancy. The fetus's lungs are developing but are not yet mature enough for survival outside the uterus.
Days 270-300: The foal's lungs continue to mature. The fetus begins to develop a layer of body fat. At around day 300, the foal is approaching viability outside the womb, though premature birth at this stage still carries significant risks. The mare should receive her pre-foaling vaccinations during this period (typically at 10 months / ~300 days) to ensure antibodies are present in colostrum.
Days 300-320: The foal is nearly fully developed. The mare may begin to show early udder development. Preparations for foaling should begin, including setting up a clean, safe foaling area.
Days 320-340: The foal is in its final growth phase. The mare's udder fills and may begin to "wax" (develop waxy beads of colostrum at the teat tips) in the days before foaling. The vulva softens and elongates, and the muscles around the tailhead relax. The mare may become restless, especially at night.

How to Use This Calculator

Our Horse Gestation Calculator is designed to be straightforward and informative. Follow these simple steps to calculate your mare's expected foaling date and track her pregnancy progress:

Enter the Breeding/Mating Date: Select the date your mare was bred using the date picker. If natural cover was used over multiple days, enter the date of the last mating. For artificial insemination, use the date of the procedure. If multiple inseminations occurred during one cycle, use the date of the insemination closest to ovulation.
Verify the Current Date: The calculator automatically fills in today's date. If you want to check pregnancy status for a specific date in the past or future, you can change this field.
Click "Calculate Due Date": Press the button to generate your results.
Review Your Results: The calculator will display the estimated foaling date (based on 340 days), the foaling window (330-345 days), the number of days pregnant, days remaining, current trimester with a description, a visual progress bar, a trimester timeline, and important milestones with their status (completed or upcoming).

Remember that the estimated due date is an approximation. Normal foaling can occur anywhere within the 330-345 day window, and some mares routinely foal outside even this range. Always work with your veterinarian to monitor your mare's pregnancy and be prepared for foaling a few weeks before the earliest expected date.

When Is Horse Breeding Season?

Horses are seasonally polyestrous, meaning their reproductive cycle is influenced by the length of daylight hours (photoperiod). In the Northern Hemisphere, the natural breeding season runs from approximately May through August, coinciding with the longest days of the year.

During winter months (November through February), most mares enter a period of reproductive inactivity called anestrus. During this time, the ovaries are relatively inactive, estrous cycles cease, and the mare will not accept the stallion or conceive.

As daylight hours increase in spring, mares go through a transitional period (typically February through April) during which hormonal activity resumes but cycles may be irregular and unpredictable. Ovulation during this period is unreliable, which is why breeders often use artificial lighting programs to advance the onset of regular cyclicity.

Artificial Lighting Programs

Because the Thoroughbred industry uses a universal birth date of January 1 (or August 1 in the Southern Hemisphere), breeders often want foals born as early as possible in the year. To accomplish this, mares are placed under artificial lights starting in early December, providing 16 hours of light per day. This tricks the mare's pineal gland into producing less melatonin, simulating summer conditions and advancing the onset of regular estrous cycles by 6-8 weeks.

The Estrous Cycle

During the active breeding season, a mare's estrous cycle lasts approximately 21 days. She is in estrus ("heat") for about 5-7 days, during which she is receptive to the stallion and will ovulate, typically 24-48 hours before the end of estrus. The remaining 14-16 days constitute diestrus, during which the mare is not receptive. Understanding this cycle is crucial for timing breeding and maximizing the chance of conception.

Signs of Pregnancy in Mares

Detecting pregnancy in mares, especially in the early stages, requires veterinary examination. Relying on behavioral or physical signs alone is unreliable. Here are the primary methods used to confirm and monitor pregnancy:

Veterinary Confirmation Methods

Transrectal ultrasound (14-16 days): This is the gold standard for early pregnancy detection. At 14-16 days post-ovulation, a veterinarian can visualize the embryonic vesicle (a fluid-filled sphere approximately 20-25 mm in diameter) using a rectal ultrasound probe. This examination also checks for twins, which must be managed early to avoid complications.
Follow-up ultrasound (25-30 days): A second scan confirms a heartbeat and continued viability. The embryo should have a visible heartbeat and be growing appropriately.
60-70 day ultrasound: At this stage, the fetus can be sexed, and the pregnancy is well-established past the endometrial cup stage.
Blood test (eCG / PMSG, 40-120 days): Equine chorionic gonadotropin can be detected in the mare's blood between days 40 and 120 of pregnancy. However, this test can remain positive even after pregnancy loss if the endometrial cups persist, so it should be used in conjunction with ultrasound.
Blood test (estrone sulfate, 100+ days): This hormone, produced by the fetal-placental unit, is detectable after about 100 days and is a reliable indicator of a living fetus. It is often used for mid- to late-pregnancy confirmation.
Transrectal palpation (35+ days): An experienced veterinarian can feel uterine changes and the growing pregnancy through rectal palpation beginning around 35-40 days, though ultrasound is more precise.

Behavioral and Physical Signs

While not reliable for diagnosis, some owners notice the following in pregnant mares:

Failure to return to estrus 17-21 days after breeding (though this can also indicate a hormonal imbalance or other conditions)
Increased appetite and weight gain (more noticeable in the third trimester)
Changes in temperament -- some mares become calmer, while others may become more irritable
Abdominal enlargement (typically visible from 6-7 months onward, depending on the mare's body type)
Udder development in the final weeks of pregnancy

Prenatal Care for Pregnant Mares

Proper prenatal care is essential for a healthy pregnancy and a strong, viable foal. A well-managed program covers nutrition, exercise, vaccinations, deworming, farrier care, and regular veterinary checkups.

Nutrition

Nutritional needs change significantly throughout pregnancy:

First and second trimesters: The mare's nutritional requirements are only slightly above maintenance. Good-quality forage (hay or pasture) should form the foundation of the diet. A balanced vitamin and mineral supplement is recommended, particularly if the hay is lacking in key nutrients. Mares should maintain a body condition score of 5-6 (on the 1-9 Henneke scale).
Third trimester (months 8-11): Energy, protein, calcium, and phosphorus requirements increase substantially. The mare may need a concentrate feed formulated for broodmares. Caloric intake may need to increase by 20-30% in the final months. Overfeeding should be avoided, as obese mares face increased foaling complications.
Key nutrients: Ensure adequate levels of selenium (deficiency can cause white muscle disease in foals), copper (important for skeletal development), zinc, vitamin E, and folic acid. Many broodmare feeds are specifically formulated to provide these in appropriate ratios.
Water: Clean, fresh water must always be available. Water intake increases during late pregnancy.

Exercise

Moderate exercise is beneficial throughout pregnancy. Mares at pasture typically get adequate exercise naturally. Mares in work can generally continue light to moderate exercise through the first two trimesters, with activity gradually reduced during the third trimester. Avoid strenuous activities, intense competition, or situations that could result in trauma. Turnout with calm, compatible companions is ideal.

Vaccinations

Vaccination is a critical component of prenatal care. Key vaccinations for pregnant mares include:

Equine herpesvirus (EHV-1/EHV-4): Vaccinate at months 3, 5, 7, and 9 of pregnancy using a killed vaccine specifically labeled for use in pregnant mares. EHV-1 is the leading infectious cause of abortion in horses.
Core vaccines (tetanus, Eastern/Western encephalomyelitis, West Nile virus, rabies): Administer 4-6 weeks before the expected foaling date. This timing ensures that the mare produces maximum antibody levels in her colostrum, which the foal will receive in the first 12-24 hours of life.
Influenza and rhinopneumonitis: Follow your veterinarian's protocol, typically boostered before foaling.
Botulism (in endemic areas): A series of three vaccines, with the final dose given 4-6 weeks before foaling.

Always consult your veterinarian about the appropriate vaccination schedule, as recommendations may vary by region and risk factors.

Deworming

A strategic deworming program is important during pregnancy. Work with your veterinarian to develop a plan based on fecal egg count results. General guidelines include:

Deworm with an ivermectin-based product in the first trimester.
Administer another deworming treatment in the second trimester if fecal egg counts warrant it.
Deworm with ivermectin or ivermectin/praziquantel approximately 30 days before the expected foaling date. This reduces the parasite load the foal will be exposed to through the mare's manure in the early days of life.
Avoid organophosphate dewormers during pregnancy.

Farrier Care

Regular hoof care should continue throughout pregnancy on a 6-8 week schedule. As the mare's weight increases and her center of gravity shifts in late pregnancy, balanced hooves are especially important for comfort and soundness. Some farriers may need to adjust their approach to trimming in late pregnancy, as the mare may have difficulty standing on three legs for extended periods.

Regular Veterinary Checkups

In addition to the early pregnancy ultrasounds, veterinary checkups at various stages help monitor the mare's health and the foal's development. Discuss with your veterinarian a schedule that may include checks at 45 days, 90 days, 5 months, 7 months, and monthly in the final trimester.

Signs That Foaling Is Near

As the expected foaling date approaches, mares exhibit a series of physical and behavioral changes that signal labor is imminent. Recognizing these signs helps owners prepare for delivery and know when to be on "foal watch."

Two to Four Weeks Before Foaling

Udder development: The mare's udder gradually fills and enlarges. This process may start 2-6 weeks before foaling in maiden mares, or just days before in experienced broodmares.
Abdominal shape change: The foal shifts position, and the mare's belly may appear to "drop" as the foal moves deeper into the pelvis. When viewed from behind, the mare's flanks may look more hollow.
Softening of the vulva: The tissues of the vulva begin to soften and elongate in preparation for birth.

One to Three Days Before Foaling

Waxing: Small, waxy beads of dried colostrum appear at the tips of the teats. Waxing occurs in approximately 95% of mares within 48 hours of foaling, making it one of the most reliable predictive signs.
Milk dripping or streaming: Some mares will drip or even stream milk before foaling. If significant amounts of colostrum are lost, it may need to be collected and frozen to ensure the foal receives adequate passive immunity after birth.
Relaxation of the sacroiliac ligaments: The muscles and ligaments around the tailhead and croup become noticeably soft and "mushy." You may see deep depressions on either side of the tailhead.
Vulvar elongation and relaxation: The vulva becomes noticeably longer and more relaxed.

Hours Before and During Foaling

Restlessness: The mare may pace, look at her flanks, get up and down repeatedly, sweat, and show signs similar to colic.
Sweating: Sweating along the neck and flanks is common as first-stage labor begins.
Tail wrapping or raising: The mare may hold her tail to one side or raise it repeatedly.
Lying down: Most mares foal lying on their side (lateral recumbency). Active pushing begins once the mare is down.
Water breaking: The chorioallantois ruptures, releasing several gallons of allantoic fluid. This is the definitive start of second-stage labor. From this point, the foal should be delivered within 20-30 minutes.

Normal foaling (parturition) in horses is a rapid process. First-stage labor (restlessness, sweating, early contractions) may last 1-4 hours. Second-stage labor (active delivery from water breaking to foal emerging) should take only 15-30 minutes. Third-stage labor (passage of the placenta) should occur within 3 hours of foaling. If the placenta has not passed within 3 hours, contact your veterinarian immediately, as retained placenta is a veterinary emergency in horses.

Complications and When to Call the Vet

While most mares foal without difficulty, it is essential to recognize warning signs that require immediate veterinary intervention. Time is critical during equine foaling complications.

Dystocia (Difficult Birth)

Dystocia occurs when the foal cannot be delivered normally. Warning signs include:

Water has broken but no feet are visible within 10 minutes
Only one foot is visible (normal presentation shows two front feet, one slightly ahead of the other, with the nose resting on the knees)
The foal's soles are facing upward instead of downward (indicates a breech or upside-down presentation)
The mare has been actively pushing for more than 20-30 minutes without progress
Red/maroon tissue appears at the vulva before the foal (a "red bag" delivery -- premature separation of the placenta, requiring immediate intervention)

If any of these signs are observed, call your veterinarian immediately. While waiting, if you are experienced, you may attempt to gently reposition the foal, but do not force anything. A "red bag" delivery requires the membrane to be torn open immediately to allow the foal to breathe.

Premature Birth

Foals born before 320 days of gestation are considered premature. These foals may have:

Silky, thin hair coat
Floppy ears and overall weakness
Inability to stand or nurse within normal timeframes (a healthy foal typically stands within 1-2 hours and nurses within 2-3 hours)
Incomplete ossification of the cuboidal bones in the legs (can lead to angular limb deformities if the foal is allowed to bear weight)
Immature lungs, potentially requiring supplemental oxygen

Premature foals require specialized neonatal intensive care and should be treated by an equine veterinarian as soon as possible.

Abortion and Pregnancy Loss

Pregnancy loss can occur at any stage. Common causes include:

Equine herpesvirus (EHV-1): The leading infectious cause of abortion, typically occurring in the last trimester. This is why vaccination is critical.
Placentitis: Infection of the placenta, which may be caused by bacteria ascending through the cervix. Signs include premature udder development and vaginal discharge.
Umbilical cord abnormalities: Excessively long cords can twist, compromising blood flow to the foal.
Mare reproductive loss syndrome (MRLS): Associated with Eastern tent caterpillars in some regions.
Congenital abnormalities: Genetic defects in the fetus can lead to pregnancy termination at various stages.

If your mare shows signs of premature labor, vaginal discharge, sudden loss of udder development, or the passage of fetal membranes, contact your veterinarian immediately. The aborted fetus and placenta should be saved for laboratory examination to determine the cause.

Post-Foaling Complications

Retained placenta: If the placenta is not passed within 3 hours, it is a veterinary emergency. Retained placenta can lead to septicemia, laminitis, and death.
Uterine hemorrhage: Internal bleeding after foaling, more common in older mares. Signs include restlessness, sweating, elevated heart rate, and pale gums.
Foal rejection: Some mares, particularly maiden mares, may refuse to allow the foal to nurse. This requires intervention to ensure the foal receives colostrum.
Meconium impaction in the foal: The foal should pass its first stool (meconium) within the first few hours. Straining or failure to pass meconium requires an enema and possibly veterinary attention.

Frequently Asked Questions

A horse gestation calculator provides an estimated due date based on the average 340-day gestation period. While this is a useful planning tool, it is important to understand that normal equine pregnancies can range from 320 to 370 days. The calculator gives you a central estimate and a foaling window (330-345 days) that captures when most mares will foal. Factors such as breed, individual variation, season of conception, and the sex of the foal can all influence the actual foaling date. For the most accurate prediction, combine the calculator's estimate with regular veterinary monitoring, observation of physical signs (udder development, waxing, ligament relaxation), and knowledge of the mare's previous foaling history. Mares that have foaled before often follow a similar pattern each pregnancy, so tracking previous gestation lengths is valuable for predicting future ones.

Yes, it is possible and not uncommon for a horse to be pregnant for 12 months or even slightly longer. While the average gestation is 340 days (approximately 11 months and 6 days), some mares regularly carry for 355-370 days, which approaches or exceeds 12 months. Draft breeds and individual mares with consistently longer gestation patterns may routinely foal at 12 months. Mares bred early in the season (January-February) are also known to carry longer than those bred in the natural season (May-August). A pregnancy extending to 12 months (365 days) typically does not indicate a problem, but the mare should be monitored by a veterinarian to ensure the foal remains healthy and the pregnancy is progressing normally. Pregnancies exceeding 370 days warrant more careful evaluation.

If your mare goes past the estimated 340-day due date, there is usually no cause for immediate concern. Many healthy mares routinely foal between 345 and 360 days. Here is what you should do: Continue monitoring the mare closely for signs of impending foaling (udder development, waxing, ligament relaxation). Maintain your foal watch routine. Contact your veterinarian if the mare exceeds 360 days without showing any signs of approaching labor; they may want to perform an examination, including an ultrasound to check the foal's well-being and placental health. Do not attempt to induce labor on your own. Induction of labor in horses is a veterinary procedure that carries significant risks if not performed correctly and at the appropriate time. It is only done when the foal is confirmed to be mature enough for delivery. Keep records of the mare's behavior, appetite, udder changes, and any discharge, as this information will be valuable for your veterinarian.

The earliest reliable method of pregnancy detection in mares is transrectal ultrasound, which can identify the embryonic vesicle as early as 11-12 days after ovulation, though most veterinarians perform the initial scan at 14-16 days for greater reliability and to check for twins. A heartbeat can be detected at approximately 21-25 days. Blood tests for eCG (equine chorionic gonadotropin) become positive around 40-45 days and remain positive through approximately day 120. Estrone sulfate blood tests become reliable indicators of a viable pregnancy from about 100 days onward. Manual transrectal palpation by an experienced veterinarian can detect pregnancy changes from about 35-40 days. The failure of a mare to return to heat 17-21 days after breeding is a suggestive but unreliable indicator, as mares can fail to cycle for other reasons. For the best results, schedule an ultrasound at 14-16 days, a follow-up at 25-30 days (heartbeat confirmation), and another at 45-60 days.

Horses can conceive twins, and in fact, twin ovulations occur in approximately 15-25% of estrous cycles in some breeds (particularly Thoroughbreds). However, twin pregnancies in horses are highly problematic and rarely result in two healthy foals. The equine uterus is not designed to support two full-term foals, and twin pregnancies often lead to abortion, premature birth, or the death of one or both foals. For this reason, veterinarians routinely check for twins during the 14-16 day ultrasound. If twins are detected, the most common management approach is to manually crush one embryonic vesicle (before day 16, while the embryos are still mobile) to allow the remaining embryo to develop normally. The success rate for this procedure is very high (approximately 85-95%) when performed early. If twins are not detected until later, management becomes more difficult and may involve other interventions. It is extremely rare for a mare to carry twins to term and deliver two healthy foals -- the outcome of an unmanaged twin pregnancy is usually the loss of the entire pregnancy.

The best time of year to breed a mare depends on your goals. From a biological standpoint, the ideal time is during the natural breeding season, which runs from May through August in the Northern Hemisphere. During this period, mares are cycling regularly, ovulation is predictable, and conception rates are highest. A mare bred in June would be expected to foal the following April or May, when grass is abundant, weather is mild, and natural conditions support a healthy start for the foal. However, the racing and show industries often prefer earlier foaling dates. In the Thoroughbred industry, where all horses share a January 1 birthday, breeders aim to have foals born as close to January 1 as possible. This requires breeding in February or March, which is outside the natural breeding season. To accomplish this, mares are placed under artificial lighting programs starting in late November or December to advance cyclicity. While this approach is effective, conception rates tend to be lower during the transitional period compared to the natural season, and mares bred early often have longer gestation periods.

Preparation for foaling should begin well in advance of the expected due date. Here is a comprehensive checklist: Foaling area: Prepare a large, clean foaling stall (at least 12x14 feet, ideally 14x14 or larger). Bed it deeply with clean straw (preferred over shavings, which can stick to wet membranes and enter the foal's nostrils). Alternatively, a clean, safe, well-fenced pasture can be used in mild weather. Foaling kit: Assemble supplies including clean towels, a tail wrap for the mare, iodine (7% tincture or dilute chlorhexidine solution) for treating the foal's navel stump, a fleet enema for the foal's first stool, a bulb syringe for clearing the foal's nostrils if needed, scissors and dental floss or umbilical clamps for the cord, a watch or clock to time events, and your veterinarian's emergency contact number. Vaccinations: Ensure the mare has received her pre-foaling vaccinations 4-6 weeks before the due date. Caslick's: If the mare has had a Caslick's procedure (vulvar suture), arrange for your veterinarian to open it before foaling. Foal watch: Begin monitoring the mare closely from about 320 days. Consider using a foaling alarm or camera system. Many mares foal at night. Colostrum: If the mare is dripping milk significantly before foaling, collect and freeze the colostrum. Have a backup source of frozen colostrum or commercially available colostrum substitute on hand.

Yes, in most cases, you can ride a pregnant mare during the first and second trimesters of pregnancy (up to approximately 6-7 months). Light to moderate exercise is generally considered beneficial for maintaining the mare's fitness, muscle tone, and overall health. Many breeders and riders continue light work, trail riding, and flatwork through the first 6 months with no adverse effects. As the mare enters the third trimester and the foal grows rapidly, riding should be progressively reduced. By month 8-9, most mares should be transitioned to light exercise only, such as hand-walking or quiet turnout. The mare's changing balance, increased weight, and loosening ligaments make more strenuous activity inappropriate and potentially risky. Activities to avoid throughout pregnancy include jumping, strenuous galloping, intense competition, and any situation where falls or collisions are likely. Always monitor the mare for signs of discomfort, fatigue, or reluctance. Individual mares vary, and some may indicate that they prefer to stop work earlier than expected. Consult your veterinarian for specific guidance based on your mare's health status and fitness level.