The process of pregnancy and childbirth are one of most studied in the world, as part of the research on the human reproductive system. There are millions of things related to the reproduction system of the humans which is not clear to mankind. But a lot of knowledge on the topic has already been gained on the topic of human reproduction. There are various matters connected to pregnancy which man has been able to understand. The female reproduction system is something which calls for great amount of study and the menstrual cycle is an important part of it. The details about menstrual cycle are given below.
The menstrual cycles are certain physiological changes which take place in many of the female mammals, which includes the humans. It is a recurring process which take place at definite periods of time. One of the most interesting things about the menstrual cycle is that it is only the human females whose ovulation periods remain hidden. As far as the other animals are concerned, the an ovulating female is quite obvious to the male species. It is the hormones which control the menstrual cycle. The start of the menstrual cycle is an important part of attaining puberty in the females.
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On an average, the first menstrual cycle occurs in a woman at the age of 12. But the occurrence of the same at ages 8 or 10 is also quite common. The menstrual cycles cease to occur in a woman once she reaches a certain age, in most of the cases the age of 51. The different phases of a menstrual cycle include the menstrual phase, follicular phase, ovulation, luteal phase and ischemic phase. The duration of the menstrual cycles depend on a lot of factors which include the diet, health, heredity, etc of the woman.
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