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Menstrual cycle The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The ovarian cycle controls the production and release of eggs and the cyclic release of estrogen and progesterone. The uterine cycle governs the preparation and maintenance of the lining of the ...
Diagram illustrating how the uterus lining builds up and breaks down during the menstrual cycle Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone ...
The first menstrual bleeding is referred to as menarche, and typically occurs about two years after thelarche. [53] The average age of menarche is 12½ in the United States. [58] Most American females experience their first period at 11, 12 or 13, but some experience it earlier than their 11th birthday and others after their 14th birthday.
Girls have started getting their first period earlier than in the past, so now it's considered "normal" for girls to get their period between 9 and 14 years old, says Maureen Whelihan, M.D., an ob ...
Liesel Teen, a labor and delivery nurse and founder of Mommy Labor Nurse, explains that “where you are in your menstrual cycle can affect different things, including your weight, vaginal ...
After providing personal details, they were given a description of menstrual synchrony: "Menstrual synchrony occurs when two or more women, who spend time with each other, have their periods at approximately the same time" (p. 257). [65] After reading the description they were asked whether they were aware of menstrual synchrony and whether ...
This special time period is called "full term". [63] Whenever possible, waiting for labor to begin on its own in this time period is best for the health of the mother and baby. [17] The decision to perform an induction must be made after weighing the risks and benefits, but is safer after 39 weeks. [17] Events after 42 weeks are considered ...
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