A girl produces limited number of eggs (ovum) in a month and the process of producing eggs is also limited to a particular age. Throughout her reproductive years, a complex reaction of hormones prepares one or two eggs a month for possible fertilization. The ovaries usually alternate, each releasing an egg - called ovulation - every month. In response to hormonal workout, the uterine lining builds up in preparation for a fertilized egg. Around day 14 of an average 28-day cycle, an ovary releases an egg into the adjacent fallopian tube, and tiny hairs begin sweeping the egg toward the uterus. Men make millions of sperm a day, starting at puberty. A semen ejaculate may contain as many as 500 million sperm, most of which are capable of fertilizing an egg. The more sperm in the ejaculate, and the better their quality, the greater the chances of conception. In one to several hours, the sperm swim from the vagina up through the cervix and uterus into the fallopian tubes. Most of them don't make it.
Sperm and egg must meet at the outer end of the fallopian tube. Estimates vary, but the egg is ripe for fertilization for only about a day. Some fertility experts say it's as little as eight hours. But all it takes is one sperm vigorous enough to make the trek, and lucky enough to end up in the tube that has the egg. "It's like going on a date - if the guy isn't downstairs waiting, the girl isn't going to come down ready." And sperm can hang out for a while, surviving in the female reproductive tract for at least a day or two, probably three, possibly four or more. It depends on the semen, the sperm and how hostile the female's system is.
<span style="color: #0098c8; ><span style=" color:="" #0000ff;"="">Can Sperms pass through the clothes and makes her pregnant?
Though sperms cannot fly but they can pregnate if your wetness touches her wetness. But it occurs very rarely.
How can I prevent pregnancy?
Pregnancy can be prevented by using appropriate contraception techniques.View Birth Plan for Details.