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A study of girls in Istanbul, Turkey, in 2011 found the median age at menarche to be 12.7 years. [ better source needed ] [ 9 ] In the United States, an analysis of 10,590 women aged 15–44 taken from the 2013–2017 round of the CDC's National Survey of Family Growth found a median age of 11.9 years (down from 12.1 in 1995), with a mean of 12 ...
The study, released in the final days of Menstrual Health Awareness Month, found that early menarche is associated with an increased risk of adverse health outcomes, including heart disease ...
Having the right amount of body fat is critical to producing the hormones that lead to your first cycle, which is why girls tend to put on a little weight before they have their menarche, she says.
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 ...
Menstruation in synchrony with the moon is widely assumed in myths and traditions as a ritual ideal. [12] [13] The idea that menstruation is—or ideally ought to be—in harmony with wider cosmic rhythms is one of the most tenacious ideas central to the myths and rituals of traditional communities across the world.
The normal level of hemoglobin (an oxygen-transport protein found in red blood cells) for women is 12.0 to 15.5 g/dL (for men, 13.5 to 17.5 g/dL). [ 51 ] [ 52 ] [ 53 ] Women's hearts have finer-grained textures in the muscle compared to men's hearts, and the heart muscle 's overall shape and surface area also differs to men's when controlling ...
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 ...
[1] [2] [3] Different cultures and communities across the globe celebrate Menarche (first period). [4] This practice is followed by Apache , Ojibwe and Hupa tribal communities from different parts of North America, Ulithi tribe from South Pacific region, Japan, Africa, and India among others.