However, there are some factors that can influence the number of foals a mare has:
* Age: Mares usually reach sexual maturity around 2-3 years old and can continue to have foals until they are around 15-20 years old.
* Health: A healthy mare is more likely to conceive and carry a foal to term.
* Nutrition: Adequate food and water are essential for a mare to be able to conceive and produce a healthy foal.
* Environment: Factors like predation, disease, and harsh weather conditions can impact a mare's ability to reproduce.
It's important to note that wild horse populations are managed by the Bureau of Land Management (BLM) in the United States. The BLM uses various methods, including roundups and contraception, to control the number of wild horses on public lands.