Mare Foaling Signs: 8 Signs of Foaling When Your Mare is Ready for Birthing

What an exciting time! It’s often with great anticipation that horse owners await the arrival of a new foal. Following an 11-month pregnancy plus or minus a week, the final month brings about physiological and behavioral changes that indicate your mare is preparing for birth.

Mare Foaling Time: 8 Signs Your Mare is Ready for Birthing

1. Distended Udder

 As the unborn foal matures during the last month of pregnancy, a distended udder is often the first sign of the approaching birth. Typically, your mare’s udder will fill at night and shrink during the day. When the udder remains full, foaling may be days or only hours away.

2. Enlarged teats

 In the final days before foaling, the teats of your mare’s udder begin to extend outward as her udder distends. Pressure from her growing milk supply pushes the teats away from the udder and, as foaling nears, the teats enlarge, ready for the arrival of her newborn foal.

3. Relaxed pelvis

 Around three weeks prior to foaling, the muscles of the pelvic area begin to relax to enable the passage of the foal through the birth canal. In most mares, a hollow develops on either side of the base of the tail. However, this change may not be seen in all mares. If you palpate the muscles they feel very soft and have very little tone.

4. Waxing teats

The appearance of wax-like beads on the end of each teat can occur weeks or within 12 hours before birth. While not all mares will exhibit waxing of the teats, these droplets are the immune-supportive colostrum every newborn foal requires within their first hours of life.

5. Milk flow

 In addition to colostrum droplets, some mares will also begin to secrete milk soon before foaling. It’s imperative this is watched closely. Any mare steaming milk for several days may lose large amounts of colostrum — and the vital antibodies and laxative it contains for your newborn foal.

6. Relaxed vulva

 During the final 24-48 hours, your mare’s vulva — the outer lips of the vagina — will noticeably swell and lengthen, readying itself for the birthing process where it will stretch to several times its normal size as the foal is delivered.

7. Behavioral changes

As early as several weeks prior to foaling, your mare may show signs of irritability and restlessness. When the first stage of labor begins, mares usually seek out a quiet location where they can give birth undisturbed.

Often, a mare in labor will walk continuously — only lying down to give birth. She may also swish her tail, look at her sides, and kick at her abdomen. If she eats, drinks, defecates, and urinates as normal, you don’t need to suspect colic. The first stage of labor has begun.

8. Sweating

 Birthing is hard on your mare’s body. It’s not unusual to encounter sweating across the neck, flanks, and body both in the lead-up to and during delivery. Prior to foaling, your mare may feel warm and damp, and many mares will sweat as labor approaches.

Mare Foaling Time

To provide your mare with a safe and secure place to foal, without outside interference, place her in a paddock or stall free from hazards. In the final weeks ahead of foaling, you should continue to watch your mare closely to ensure mare and foal come out of delivery happy and healthy.


  • Dr Louise Cosgrove

    The founder of Exclusively Equine Veterinary Services, Louise is driven to support horses in their recovery from injury or illness. A graduate of the University of Queensland, with international equin...

    View all posts
Shopping Cart
Scroll to Top

Download FREE Guide on Foaling Time or When to Call the Vet​

Download FREE Guide to 7 Reasons for Horse Dental Care