The two ovaries are of a size of an almond each. They are perched in the pelvis, one on each side, right within the fallopian tubes’ grasp. They have two functions: the first one is the production of eggs, and the second function is the secretion of hormones. Each month, when the time of ovulation comes, a mature egg comes out of one of the ovaries. It is “brought” by the fimbria and drawn into one of the fallopian tubes.
 The eggs in the ovary stay in the follicules. They contain the eggs; just aw well as granulose cells and theca cells which nurture the egg, and produce the female hormones. During its fetal life the ovary produces about two million of eggs. However, the number of eggs progressively decreases, till only no more than 300,000 eggs are left at the time of birth – a lifetime stock. During the fertile years of a woman less than 500 of these eggs will come out into the fallopian tubes – once in each menstrual cycle. Unlike the testis, which is churns out billions of new sperm, the ovary never produces any new eggs. One of the existing eggs is matured for ovulation each month, and even this limited supply runs out at the time of menopause.

The Menstrual Cycle
The menstrual cycle is the time from the beginning of one period to the beginning of the next one. Each woman’s menstrual cycle lasts individually and usually it is about 28 – 30 days long, though anywhere from 3 to 6 weeks is considered normal.

During the menstrual cycle woman’s uterus gets ready for pregnancy. Its lining grows richer and thicker under the influence of women’s hormones – estrogen and progesterone. It all happens for the egg fertilization process took place. If pregnancy does not occur, the uterus gets rid of this lining in order for a new one would grow during the next cycle. The old lining comes out of the uterus through the vagina as the menstrual flow of blood. The menstrual flow actually consists of the shed uterine lining, blood, coming from the blood vessels, which are torn when the lining is shed; and the last component of it is the degenerated unfertilised egg.

Some women have their menstrual flow heavy, some have not too much blood flow, If the flow is heavy, there may even be clots in the blood. Sometimes the uterine lining is shed large fragements and these may even sometimes look like bits of pregnancy tissue for the women, who thin they are miscarrying.

Many infertile women are obsessed with their menstrual periods, and tney worry about every least variation of the blood flow: whether it is too dark or too light, too much, or too little. But you are to know that the menstrual flow has nothing to do with your fertility and you should not be too concerned about any vatiation, which is quite often and of little significance.