Word: sperm
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They discussed the many different ways LGBT couples can have children, from legal adoption to medical options like surrogacy and egg or sperm donations...
...panelists said that sperm and egg donors as well as surrogates—women who agree to carry and give birth to a baby for other parents—have made it possible for more LGBT couples to start families...
...most important battle of anyone's life is when sperm meets egg. It's Darwin at its most elemental, your genes vs. hers. One person goes on to the next round of the species, and the other goes to the grave a loser for all eternity. This is why sex is practiced in the style it often...
...that evolutionary changes take place over many generations and through millions of years of natural selection. But Bygren and other scientists have now amassed historical evidence suggesting that powerful environmental conditions (near death from starvation, for instance) can somehow leave an imprint on the genetic material in eggs and sperm. These genetic imprints can short-circuit evolution and pass along new traits in a single generation. (See TIME's photo-essay on Charles Darwin...
...Published in 2006 in the European Journal of Human Genetics, it noted that of the 14,024 fathers in the study, 166 said they had started smoking before age 11 - just as their bodies were preparing to enter puberty. Boys are genetically isolated before puberty because they cannot form sperm. (Girls, by contrast, have their eggs from birth.) That makes the period around puberty fertile ground for epigenetic changes: If the environment is going to imprint epigenetic marks on genes in the Y chromosome, what better time to do it than when sperm is first starting to form...