If you have a mare that is expecting, she will need daily maintenance but the first 7 months of the gestation period will require a little extra care on your part.
Make sure your mare is given the proper nutrition and keep her in good shape for the rigors of pregnancy through light exercise. Check with your vet as each pregnancy is unique but most people can continue riding their mares well into their pregnancies.
Also, keep her stress levels down. Don't transport her unless it is absolutely necessary, especially during the first 2 months of her pregnancy as that is when the chance of loss is the greatest. Do not introduce another horse to the herd at this time either.
Make sure her vaccinations are up to date and ask your vet what other vaccinations would be sensible for her at this time. As her pregnancy progresses, monitor her weight and watch for any signs she feels "off". In addition, much like when a woman is pregnant and has hormonally induced mood swings; a mare can have that also. Be aware she may love you one day and avoid you and everyone else the next.
About 9 months into her pregnancy, most vets will advise that she no longer be ridden but can be walked around her pasture or pen area for light exercise. During the 11th and final month of her pregnancy, keep an eye on your mare for signs she is in labor. One way is that her teats will fill and begin dripping milk. Birth usually occurs within a very short period of time after that.






