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In the book Developmental Biology by Scott F. Gilbert and Michael J. Barresi, it says:

Most human embryos die before being born. You survived.

So how come is that true???

And what percentage of pregnant women lose their unborn child(ren)?

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  • $\begingroup$ How can we possibly know without knowing with certainty that a woman is pregnant? Many are lost only days after implantation. $\endgroup$ Mar 2, 2020 at 0:51
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    $\begingroup$ What attempt have you made to answer this question on your own? $\endgroup$
    – John
    Mar 2, 2020 at 2:40
  • $\begingroup$ Is the fastet sperm always the best? $\endgroup$
    – Solar Mike
    Mar 2, 2020 at 13:39
  • $\begingroup$ It's a tougher question than it looks; estimates vary pretty widely ncbi.nlm.nih.gov/pmc/articles/PMC5443340/#__sec2title $\endgroup$ Nov 6, 2021 at 19:22

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