A late or missed period could be caused by any of the following: Pregnancy, Stress, Physical stress like a severe illness, STD's, rapid weight loss or gain, strenuous exercise, dieting, or binging and purging, changes in your usual routine like going on vacation can cause this also. Hormone imbalance is one cause, polycistic ovary syndrom can also be a cause. Problems of the thyroid gland, pituitary gland, adrenal glands, or ovaries can be rare causes of irregular periods.
Prolonged menstrual cycles are menstrual cycles that are longer than usual for you. The reason for prolonged menstrual cycles is that ovulation has occurred later in the cycle than usual. Nothing happens to ovulation per say, it's just later.
Ovulation is what precedes your menstrual cycle. It is what causes it.
It is controlled by the uterus. That is where the uterus lining is which causes the menstrual cycle
Pregnancy.Drastic change in diet.
You can't have a two day menstrual cycle. A menstrual cycle is the entire reproductive cycle, including ovulation and menstruation, so you can't possibly have a two day menstrual cycle. You may experience two day menstruation, or mid-cycle spotting for two days.
The endocrine system
due to hormonal imbalance..
Several hormones are involved in the female menstrual cycle, the ovaries produces oestrogen which causes changes at puberty and helps control the menstrual cycle, and stimulates production of LH.
Various things can happen to cause bleeding outside of the menstrual cycle. For example, it is possible for sex to cause bleeding.
It is important to know the roles of each system in the body. The reproductive and the endocrine system is the cause of the onset of the menstrual cycle.
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