MC (+) usually refers to a positive menstrual cycle, which means the presence of a menstrual cycle, i.e., a state in which menstruation has begun and is not menopausal.
MC in medicine generally refers to the menstrual cycle, the interval between the first day of two menstrual periods can be referred to as a menstrual cycle, most women’s menstrual cycle is 21 to 35 days, an average of 28 days, but there is individual variability in each woman’s menstrual cycle.
A woman’s first menstrual period occurs between the ages of 13 and 14, and menopause usually occurs after menopause, usually between the ages of 45 and 55.
At the age of 13 to 14, the ovaries start to produce estrogen and progesterone, and when their levels decrease, the uterine lining loses its support and sheds, leading to menstruation.
For more information, please consult your doctor.