anorexic women or intense female athletes might not have periods because their bodies are not healthy enough to nurture a growing fetus.
Unlikely, but possible. If she is still having a menstrual period, yes.
The hormone that causes ovulation to occur in the menstrual cycle is called luteinizing hormone (LH).
endocrine
Blood
Yes. You can stop at any time, but that is usually the easiest and the way the causes the least irregular bleeding.
The first day of a womans menstrual cycle is also the first day of menstruation.
When a woman is having her period is it called menstruation. Another term is menstrual phase as this is one of several phases in the menstrual cycle.
the Endocine system.
Huge temperature changes.
Common reasons for not having a menstrual cycle include menopause, pregnancy and after having a hysterectomy. Extreme weight gain or weight loss can also cause a menstrual cycle to stop. Certain types of birth control can also contribute to a lack of periods.
Reproduction (having a baby)
yes