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You can read about menstrual cycle from this link http://info.k4health.org/inforeports/menstruation/menstruation.pdf That report was written very easy and contain main facts about menstrual cycle.
Yes, the ovulatory cycle and menstrual cycle are the same thing. Both talk about the reproductive cycle, but one focuses on ovulation as the main feature of the cycle and the other focuses on menstruation as the main feature of the cycle. There is no difference between these two cycles.
They are the two main hormones regulating the menstrual cycle and fertility.
The main purpose of the menstrual cycle is to prepare the female body for reproduction or pregnancy. During this time, a new egg is fertilized. If a woman is not pregnant, the uterus will shed.
Ovaries secrete two kind of hormones: estrogens and progestrogens. The principal estrogen secreted by the ovary is estradiol (regulates the devolpment of external sexual characteristics of females and menstrual cycle). The main progestrogen is progesterone which acts during menstrual cycle and prepares the inner revetment of uterus for pregnancy.
Estrogen is the main hormone responsible for a woman's period. Rising and falling estrogen levels cause the various stages of the menstrual cycle.
main organ; pancreas is accessory
Estrogen is the main hormone responsible for a woman's period. Rising and falling estrogen levels cause the various stages of the menstrual cycle.
In general, the main term is the condition, disease, symptom, or eponym (disease named after a person), NOT the organ or body system involved.
The main organ of the skeleton is the bones.
the main organ of the muscular system is the muscles
Im sure there are other reasons also but I am aware of the main reason, When women have their menstrual cycle it is our natural way of flushing out the old cutchi! keeps us fresh inside, though some say your period is gross it actually keeps us fresh!