24 March 2014
Assisted Reproductive Technology
Fertility is the ability to reproduce, having children. Every human being begins life as a fertilized egg, the result of the combination of the male sperm and female egg. But despite that nature gave us all humans this ability, often there are natural obstacles that prevent us from conceiving. In more than 10% of all infertile couples, there is no reason for the infertility, and approximately 5 % of cases, the problem seems to disappear on its own. Often, an infertile couple finds that the mere fact of exposing the problem to a fertility specialist psychological stress relaxes to obstacles. Only 35 % of apparently infertile couples cannot conceive a child, they are sterile incurable.
When a girl is born has about 400,000 eggs in her ovaries. The number decreases to about 10,000 to stay in puberty, when the body of a girl is ready for playback.
Only about 400 eggs fail to develop fully. In adulthood, one egg matures each month one of the ovaries and released. This is called ovulation. If a sperm into the uterus and it is fused with the egg, it is said that the egg has been fertilized. Fertilization the human embryo is a new life. An adult male produces about 250 million sperm a day in his testicles. "Sperm are tiny cells in a manner similar to a tadpole, which ejaculate and introduced into the vagina in women during intercourse" (Ranucci, 18). A man can produce up to 70 or more years old.
The most common causes of male infertility are unable to produce sperm, or not producing the number of them is normal and active enough to swim towards the egg, through its outer surface and combined with...