Which of the following are all parts of the female reproductive system in horses?

The choice that accurately lists parts of the female reproductive system in horses is the first option, which includes the uterus, vagina, and cervix.

In horses, the uterus is crucial for housing and nourishing the developing fetus during pregnancy. The vagina serves as the passageway for mating as well as for the birthing process. The cervix acts as a barrier between the vagina and the uterus, providing protection to the uterus during pregnancy and facilitating the passage of sperm during breeding.

The other choices include components that do not consistently align with the anatomy of a mare. For instance, the fallopian tube is not a part of the equine reproductive system; instead, the ovary is involved in the development and release of eggs, while the cervix and uterus are vital for reproduction but were not accurately portrayed in the context of the other selections.

Thus, recognizing the correct components of the female reproductive system is important for understanding mare reproduction and health.