Tuesday, June 3, 2014

Prenatal Egg Selection

So, when talking about epigenetics in lecture a few times, the point was brought up that women have all of their eggs for their life from birth. I then stumbled across this article regarding the selection of more healthy eggs and removal of unhealthy ones, even before birth. They estimated that at the time of birth, the body has already discarded 80% of all the eggs that were initially there, making me picture fetuses as more so just living egg sacks (at least for a little while). One of the more interesting parts of the article was a theory that healthier eggs are selected by the body earlier on, which would leave potentially damaged eggs for later years, which could explain the higher risk of developmental problems in children born from older women.

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