Anatomy of ctvet exam question

 menstrual cycle 

The menstrual cycle is a natural process that occurs in female mammals, involving the shedding of the uterine lining when pregnancy does not occur. It typically lasts 28 days and is controlled by hormones.

he menstrual cycle is a natural reproductive process that occurs in female humans and other mammals. It is a series of physiological changes that prepare the uterus for pregnancy and involve the periodic shedding of the uterine lining (endometrium) when pregnancy does not occur. The menstrual cycle typically lasts about 28 days, although it can range from 21 to 35 days, and is controlled by the interaction of hormones produced by the hypothalamus, pituitary gland, ovaries, and uterus. The menstrual cycle is characterized by several phases, including the follicular phase, ovulation, and the luteal phase. The menstrual cycle is important for female fertility and overall health, and irregularities in the menstrual cycle can be indicative of underlying health problems.