how much number of sperms needed for normal fertilization ?
Answers
only one sperm is needed for normal fertilization.
Answer:
THE SIMPLE, BUT IMPORTANT ANSWER IS 1. SO, WHY DO MEN MAKE MILLIONS OF SPERM?
Sperm are constantly in danger. Inside the testicle it takes a sperm about 72 days to go from a germ cell to a fully mature sperm cell capable of fertilizing an egg. During that time, it needs proper nutrition and temperatureto develop normally. Once mature, sperm are stored in a long tube called the epididymis where they wait to be ejaculated. Like tiny engines, mature sperm cells produce a form of exhaust known as reactive oxygen species (ROS) that can damage the cell’s membranes. After about a week in the epididymis, sperm cells that haven’t been ejaculated begin to die.
For the lucky sperm that make it into the female’s body, it’s a whole new world of danger. Vaginal walls tend to be acidic to protect women from potential infections. During the fertile window, the female creates a sperm friendly fluid that enables sperm to swim up towards the egg. Sperm are not that smart. Many of them get lost in the cervix. Those who do make it into the uterus are greeted by white blood cells that see the sperm as invaders and attack them. These sperm swim like crazy to try to find the Fallopian tube while avoiding white cells. Finding the fallopian tube is like finding a needle in a haystack. Of the millions of sperm released upon ejaculation, only a handful make it to the fallopian tube where the egg is released. There, the sperm must survive long enough to meet and fertilize the egg. Are you ready to test your sperm?
So, for men, fertility is a numbers game. The more healthy swimmers you send in, the better your chances are that one of them will find the egg.
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