Question

what is termed an menstrual cycle is humans is called the ______ cycle in canines
amnhorrhea
primimenorrhea
estrus
menstruation

Explanation:

In humans, the menstrual cycle is a reproductive cycle. In canines, the equivalent cycle is the estrus cycle. Amnhorrhea is not a recognized term in this context. Primimenorrhea refers to the first menstrual period in humans. Menstruation is a part of the human menstrual cycle, not the equivalent in canines.

Answer:

C. estrus