It may be one or a combination of low sperm concentration, poor sperm motility, or abnormal morphology. The rates of infertility in less industrialized nations are markedly higher and infectious diseases are responsible for a greater proportion of infertility. The present literature will help in knowing the trends of male factor infertility in developing nations like India and to find out in future, various factors that may be responsible for male infertility.
By Nicola Harley. A British man who is believed to be the world's most prolific sperm donor fathering more than children finds his clients through Facebook. He believes to date he has fathered at least children over the last 16 years but admits the figure could be in excess of 1,
Cynthia Daily and her partner used a sperm donor to conceive a baby seven years ago, and they hoped that one day their son would get to know some of his half siblings — an extended family of sorts for modern times. So Ms. Daily searched a Web-based registry for other children fathered by the same donor and helped to create an online group to track them.
The lower jaw usually has 20 to 25 pairs of large 10 inches [25 cm] long teeth. One source suggests the teeth are more for fighting amongst males or for defense than for eating. Young sperm whales often don't sprout teeth until some time after they have started feeding themselves.
But a recent study found that something does outlast the cold pretty well: semen. Researchers in Australia recently thawed a batch of sperm collected from a merino sheep that had been frozen in liquid nitrogen for 50 years, finding that the little swimmers were still strong and able. When Salamon died inhis fellow researchers decided it was time to thaw the sperm samples to see if it had passed the test of time.
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Sperm donation is the provision or "donation" by a man known as a sperm donor of his sperm known as donor spermprincipally for it to be used in the artificial insemination of a woman or women who are not his sexual partners for the purpose of achieving a pregnancy. Sperm may be donated publicly and directly to the intended donor, or through a sperm bank or fertility clinic. Sperm donation enables a man to father a child for third-party women, and is therefore, categorized as a form of third party reproduction.
A man who froze his sperm more than two decades before having twins with his partner has claimed a world record. After his sperm had been kept in cold storage for 26 years and days, his partner underwent in-vitro fertilisation in The previous world record holder, Alex Powell, had had his sperm frozen for 23 years and the story was reported around the globe.
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The Guinness Book of World Records has a lot of variety, ranging from incredible feats by Olympic athletes to the man who has the longest nails in the world this is a FACT. Masanobu Soto from Japan made his country proud by masturbating for 9 hours and 58 minutes. He beat the previous world record — which was also his — by 28 minutes.