Primary amenorrhea is when you haven’t gotten a first period by age 15 or within five years of the first signs of puberty.There are two classifications of amenorrhea: This lining sheds as the menstrual period if there’s no pregnancy. Uterus, which responds to the hormones and prepares the lining.Ovaries, which produce the egg for ovulation and the hormones estrogen and progesterone.Pituitary gland, called “the master gland,” which produces the hormones that instruct the ovaries to ovulate.Hypothalamus, which controls the pituitary gland.A dysfunction in any of these parts can prevent a person from getting a period: The hormones responsible for this cycle originate in different parts of the body. If there is no pregnancy, the cycle ends with the uterus shedding its lining. Every month, hormones prepare the body for pregnancy. How does the menstrual cycle work?Ī complex system of hormones controls the menstrual cycle. If amenorrhea lasts for more than three months, it should be investigated. There are times when you’re not supposed to get your period, such as before puberty, during pregnancy and after menopause. Amenorrhea can result from a change in function or a problem with some part of the female reproductive system. Amenorrhea is when you don’t get your monthly period.

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