Final answer:
The hormonal regulation of the menstrual cycle and the estrus cycle is similar in some ways but differs in others.
Step-by-step explanation:
The hormonal regulation of the menstrual cycle and the estrus cycle is similar in some aspects but differs in others. Both cycles are regulated by hormones produced by the hypothalamus, pituitary gland, and ovaries. In the menstrual cycle, the first half is the follicular phase, where follicles on the ovary grow and release estrogen. This phase coincides with menstruation. In contrast, the estrus cycle is characterized by a period of sexual receptivity (estrus) followed by ovulation, which is triggered by a surge in luteinizing hormone (LH).