When it comes to the menstrual cycle, the onset of menstruation is to be just the beginning. In fact, it is an integrated symphony of hormones, led by the brain and performed the reproductive system, and simply in order to prepare you for the birth.
Historically, the menstrual called "lunar cycle", a reminder that the menstrual cycle coincides with the lunar cycle. Typical of the menstrual cycle occurs every 28 days, but the length of the menstrual cycle varies from one girl to the other, and the length of time the natural cycle can vary from 22 days to 32 days.
Hormones
Throughout the menstrual cycle, the ovaries are stimulated by multiple hormones in the brain. Here's how the evolution of the typical session, which lasts 28 days.
First day: the start of menstruation and menstrual cycle
The first day of the onset of menstruation is also the first day of the session. At this point, your hormones are at a low level.
The first day to the fourteenth day: oocyte maturation within the ovaries
The ovaries are the genitalia, and her job producing eggs and hormones. These glands are located above the fallopian tubes (the channel that carry the egg from the ovary to the uterus), on each side of the uterus.
The ovaries contain thousands of potential eggs that are found in the ovarian follicles, the cavity grows inside the egg. Each month, mature and one of these eggs under the influence of a hormone called ovarian follicles stimulating hormone, which is produced by the pituitary gland. While mature vesicle, increasing levels of the hormone estrogen, too, which makes the lining of the uterus grows.
XIV: ovulation day
During ovulation, the secretion of another hormone, luteinizing hormone, a hormone to stimulate or yellow body, in large quantities in the mid-session. This increase in luteinizing hormone urges the ovaries to release a mature egg into the fallopian tube. If fertilization does not occur within 24 hours of ovulation, the egg harbor and turn the remaining cells to a small gland called the corpus luteum.
The fourteenth day to the twenty-eighth day: luteal phase
After ovulation, the corpus luteum secretes not only estrogen, but it also produces large amounts of the hormone progesterone. Progesterone, enhances pregnancy by increasing the thickness of the lining of the uterus so that it can accommodate a fertilized egg. In other words, it is the pregnancy hormone progesterone. If the egg is fertilized, hormone secretion will continue, but if fertilization does not happen decreases hormone level and get rid of the uterine lining in the form of menstruation. And this is the beginning of a new cycle.
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