All things being equal...good nutrition, and a pristine uterus in a mature, young mare lends itself to earlier foaling. Older virgin mares can be more problematic. A bred immature mare/filly can go longer.
Generally a minimum of 310 days will result in a viable foal, if the pregnancy is normal (no infection, body pregnancy etc.) Nominal is 335-345 days...
Mares can go a full year in foal under certain circumstances and produce a healthy foal.
Plan for an early foal...first foal mares can foal without developing an udder...hope for around 335-345 days.
Mares typically stay pregnant for 11 months, but may give birth up to a month early or late.
How long do gorilla stay pregnant
They stay pregnant up to 31 days.
Do you mean how long they stay pregnant? if so its 9 weeks.
They stay pregnant for 3-4 sim days
well a beluga can stay for 12-15 months that is a long time
Dalmatians stay pregnant for about 2 months.
40 weeks
3 years
5 months
2 dyas
9weeks