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Mammals that have menstrual cycles shed the endometrium through menstruation instead. Humans, elephant shrews , and a few other species have menstrual cycles rather than estrous cycles. Humans, unlike most other species, have concealed ovulation , a lack of obvious external signs to signal estral receptivity at ovulation (i.e., the ability to ...
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 ...
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 ...
The good news is the more we learn about the menstrual cycle phases, pay attention to the patterns in our bodies and talk to one another about our periods, the better off we all will be.
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.
What do people use when they don't have the menstrual products they need? People who don't have consistent access to menstrual products use a variety of homemade, makeshift methods to get by ...
Human reproduction naturally takes place as internal fertilization by sexual intercourse. During this process, the man inserts his erect penis into the woman's vagina and then either partner initiates rhythmic pelvic thrusts until the man achieves orgasm , which leads to ejaculation of semen containing sperm into the vaginal canal.
In the United States, some public schools have a sex education program that teaches girls about menstruation and what to expect at the onset of menarche (often this takes place during the fourth grade). Historically menstruation has been a social taboo and girls were taught about menarche and menstruation by their mothers or a female role model.