The adult woman produces one egg a month from one of her ovaries. In normal conditions, this egg is mature and ready for fertilization. In cases of illness, the egg is small and is not ready for fertilization. The fertilization process fails. Fertilization occurs, but because of its weakness, this pregnancy does not continue and falls in the first weeks from him. Ovulation of ovaries usually occurs before the date of menstrual bleeding 14 days, and graduated from the ovary to fall in the fallopian tube waiting for a period ranging from 14 to 24 hours in the channel. The egg is produced from the ovary inside the egg sac, where it grows inside the sac until it reaches the size of maturation; which is to be between 18 and 22 millimeters, and then explodes the bag to get out of the mature egg; and go to the fallopian tube and waiting.
The sperm cells are produced in the testicles. The testosterone helps the sperm reach maturity, and the vesicles with the prostate produce semen that feeds the sperm. The sperm migrate to the epididymis and then to the sperm. Mixing with sperm. When sexual intercourse occurs between a man and a woman, when a man reaches sexual intercourse, he releases semen that is rich in semen in the woman’s vagina. Due to the severity of ejaculation and the depth of sexual intercourse, these animals enter the vagina and into the cervix and then into the uterus. Live within the uterus for three to five days. In a single embryo operation, men shoot about 100 million sperm; this number depends on many factors, including men’s diet and mental state; and other factors. Most sperm enter the uterus. This depends on the strength, speed, and direction of the sperm, after the sperm reach the uterus; it is directed at one of the two channels where an egg may be present that is ready to fertilize.
Sperm attack the egg in very large numbers; and try hard to penetrate the wall strong, and in this case the egg – so to speak – to select the sperm stronger and better and stronger; to penetrate the wall. When an sperm succeeds in breaking the wall of the egg, the egg immediately makes a membrane around itself to prevent any other sperm from entering it. The semen is made up of three main sections, the tail, which is introduced immediately after entering the sperm into the egg, the head; it is the process of penetration, the genetic material of the male; which is the process of pollination, it mixes with the genetic material in the egg to be a nucleus Fetus.