how long does a horses pregnancy last?

Answer 1

12 months

Answer 2

11 - 13 months

Answer 3

I would say an horse prenancy last for 9 months like human truly thats a guest

Answer 4

11 months

Answer 5

11 months

Answer 6

4 days

Answer 7

Gestation, or term of pregnancy, in a mare is approximately 340 days but can be anywhere from 330 to 350 days. Although the mare's age and breeding history do play roles in determining the gestation period, the weather at the time the mare is due to foal seems to be the biggest factor in determining whether the foal will be born earlier or later. If the weather is warm, gestation will be shorter and if it is cold, gestation will be longer.

During gestation, the mare should still be ridden and kept to her usual routine so that when it is time to foal, it will be easier on her. Most do say not to trailer, jump, or go on hard rides once the mare is in her seventh month because of the pressure it would create. To predict when the mare is due to foal, simply subtract 25 days from one year from the breeding date or suspected breeding date.

There are several signs to look for when a mare is close to foaling. These are:



2-6 weeks before foaling – The udder distends and the milk veins under her belly may also grow large and stand out.


7-10 days before foaling – The muscles in the croup area shrink due to the relaxation of the pelvic muscles and ligaments, the abdomen develops a point at the lowest portion, while the vulva enlarges and relaxes. The tail and hip muscles will drop, resulting in the tail sticking out.


4-6 days prior – The teats fill out and the nipples may become shiny and tight.


2-4 days prior – A waxy secretion builds up on the nipples.


24 hours prior – The wax will drop off the nipples and milk drips from them.


There are four stages involved when a mare is ready to foal. These are:


The first stage for the mare is preparation. She will often become nervous, lying down and getting up frequently. Also common are tail raising or switching, sweating, urination and mild signs of colic such as looking at her abdomen, pawing the ground, lying down, and sweating lightly. This stage usually lasts 2-3 hours. Once contractions begin, either uterine or transitory, it's time to keep an eye on her. Bring her into a safe, dry lot at the barn or into a large, roomy freshly-bedded box stall. The foal is about to be born. The end of this phase is marked by the expulsion of 2-5 gallons of “water” or chorioallantoic fluid. Unfortunately this first phase begins at night so it is most commonly missed.


The second phase is activation. Uterine contractions increase and the cervix dilates. The mare may lie down, roll, and get up repeatedly during this phase. The feet of the foal will protrude – the bottoms of the hooves should be facing downward, with the nose just behind them. This stage generally takes 10-15 minutes. If problems occur, it is usually during this phase that they are corrected.


The third stage is expulsion of the fetus, when the mare will lie down and labor begins. This stage lasts approximately 15 minutes. After the foal is born, the mare will general allow herself 10-15 minutes to rest and allow the foal to get used to the surroundings. The umbilical cord may or may not be broken yet although once the foal stands, it will break and should be treated with iodine.


The last phase is the expulsion of the membranes. The mild colic signs again may be seen when this is taking place and may continue for a few hours. This phase usually occurs 15 minutes to 1 hour after birth. If this hasn’t taken place in 6-9 hours, a veterinarian should be called because retaining the placenta can cause problems such as laminitis, metritis, and infertility.


Leaving the mare alone to deliver is usually the best way, although some have installed cameras in order to monitor the progress without disturbing the mare. If you are concerned about the health and safety of your mare, you might wish to consider this option. Foaling usually starts in the night and is finished in the early morning hours. But do not rush the mare – let her foal naturally and without interference. After delivery, the foal should be nursing within 30 minute to 2 hours. Colostrum is present in this milk and contains essential antibodies that the new foal needs.

Answer 8

I guess it depends on from which animal the house got pregnant from.

Answer 9

11-11.5 months

Answer 10

11 months.

This is the wrong catagory for this question.