Menstrual synchronization
A phenomenon that occurs when two or more menstruating women live or otherwise spend a lot of time together, in which the menstrual cycles of the women gradually become synchronized. The mechanism and reason for this effect is unknown, although research suggests that it may be due to the effects of female pheromones on other women’s ovulation cycles.
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- Menstruation
The periodic blood that flows as a discharge from the uterus. Also called menorrhea, the time during which menstruation occurs is referred to as menses. The menses occurs at approximately 4 week intervals to compose the menstrual cycle.
- Menstruation, anovular
Menstruation that occurs without ovulation. Usually in anovular menstruation the egg that remains in the ovary simply disintegrates, but in some circumstances it is fertilized and a life-threatening ovarian pregnancy results.
- Menstruation, cessation of
The ending of a woman’s menstrual cycles. Menstruation ends naturally in middle age with the onset of menopause. It can also end suddenly as a result of induced menopause. Cessation of menstruation in nonmenopausal women may be due to pregnancy, illness, disorders of the hypothalamus or pituitary gland, medication, stress, overexercise, or malnutrition, among other […]
- Menstruation, retrograde
The flow of menstrual blood from the uterus into the Fallopian tubes, and potentially into the abdomen. This condition may lead to endometriosis.
- Mental child injury
Also known as emotional child abuse, this is the third most frequently reported form of child abuse (after child neglect and physical child abuse), accounting 17% of all cases of child abuse. It is likely that emotional child abuse is greatly underreported, since it can be difficult to detect and difficult to document. Emotional child […]