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When are eggs created

  1. Apr 28, 2016 #1
    Hello.
    I know girls are born with all the eggs they will ever "produce".
    but at how many months old does the female embyo have the full complement of its eggs?
     
  2. jcsd
  3. Apr 28, 2016 #2

    Evo

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    Staff: Mentor

    Do not get confused, even though girls are born with all of the eggs they will ever have doesn't mean that they are viable.

    http://www.pbs.org/wgbh/nova/baby/fert_text.html

    More information - http://goaskalice.columbia.edu/answered-questions/women-and-their-eggs-how-many-and-how-long\ [Broken]

    And a new conflicting view that women can generate new eggs. I do not know if further studies have backed or debunked this.

    http://news.nationalgeographic.com/...men-health-ovaries-eggs-reproduction-science/
     
    Last edited by a moderator: May 7, 2017
  4. Apr 28, 2016 #3
    so at 20 weeks then.
    wikid and wild - thanks!!!
    :-)
     
  5. Apr 28, 2016 #4

    ogg

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    It would be more correct to say "BY Week 20". Evo's links say that at week 20 female embryos typically have 6 - 7 million ova, at birth ~1 million are left and 400,000 at menarche and only 400-500 are ovulated over a woman's reproductive years (with the rest disappearing (dying, being reabsorbed)). It makes no claim that Week 20 is the earliest that the ova exist, nor that 6-7 million are the most an embryo ever has. Also there is now research suggesting that it might be possible that some stem cells continue creating ova after birth, but this is on-going research, and only speculative.
     
  6. Apr 28, 2016 #5

    jim mcnamara

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    Staff: Mentor

    @ogg Citations are always welcome when you post contraindicating facts....
     
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