用英语说来月经怎么说

In English, the menstrual cycle is often referred to as "having your period." The act of menstruating, or experiencing menstrual bleeding, is often referred to as "having your period" or "on your period." The menstrual cycle is the regular natural change that occurs in the female reproductive system (specifically the uterus and ovaries) that makes pregnancy possible. The menstrual cycle occurs as a result of hormonal changes in the body and typically occurs every 28 days, although it can vary from person to person. During the menstrual cycle, the body prepares for pregnancy by building up the lining of the uterus (also known as the endometrium). If pregnancy does not occur, the body will shed the uterine lining, resulting in menstrual bleeding.