The term sperm is derived from the Greek word (ÏÏÎÏÎ¼Î±) sperma (meaning "seed") and refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. A uniflagellar sperm cell that is motile is referred to as a spermatozoon, whereas a non-motile sperm cell is referred to as a spermatium. Sperm cells cannot divide and have a limited life span, but after fusion with egg cells during fertilization, a new organism begins developing, starting as a totipotent zygote. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell. In mammals, sperm develops in the testicles and is released from the penis. It is also possible to extract sperm throgh TESE.
French people are among the healthiest nations in the world, but even so, their sperm is sinking, not swimming, according to a recent study. The study analyzed the little swimmers from 26.600 men, taken in a span of 17 years, and they found a significant decrease in quality as time passes – both in concentration [...]
Scientists have finally managed to track sperm patterns in 3D, for the first time in history. Bless their gifted brains, this remarkable achievement revealed some interesting and unexpected things: some sperm swim in corkscrew patterns, while others are hyperactive and hectic. Aydogan Ozcan, the sperm study leader, placed sperm on a silicon sensor chip and [...]
Researchers at Linköping University have taken up themselves to study the intricate personality of the sperm donor. What they found was that men who cared enough to preserve their heritage were more stable and mature than non-donors. Rather extensive, as part of the study the researchers asked donors from all of Sweden’s seven sperm banks to [...]
Researchers get paid to do the weirdest things nowadays; recently, a team including Lukas Schärer and his wife Dita Vizoso, both of the University of Basel in Switzerland spent hours and hours watching and analyzing worms having sex (which, basically could be classified as worm porn) in order to find out why some flatworms have [...]