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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.
First, let's back up a little: There's a medical term for the age when you got your first period—menarche. Girls have started getting their first period earlier than in the past, so now it's ...
Sequence of images showing the stages of a normal vaginal delivery (NVD) Sequence of images showing stages of an instrumental vaginal delivery. A vaginal delivery is the birth of offspring in mammals (babies in humans) through the vagina (also called the "birth canal"). [1] It is the most common method of childbirth worldwide. [2]
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 ...
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