Do over 50% of fertilized ova pass out of a woman's body without resulting in pregnancy?

Question

I am doing research for a paper and I need this question answered in detail. Unfortunately, I have only found one source on the subject that seems highly unscientific. No opinions, please. Just facts.

Answer 1

Unfortunately it is very difficult to find data on this.  If a woman doesn't know her egg has been fertilized, then she won't know that the fertilized egg hasn't implanted.

I volunteer at a pregnancy and womens health center, and I have seen data (unsourced of course) with percentages from 30-75%.  

"it has been estimated that 75% of karyotypically normal pre-implantation embryos fail to implant."  http://www.illinoisivf.com/recurrent-pre...

You may want to contact BirthChoice http://www.birthchoice.net/.  I have volunteered for them in the past, and they may have good sourced data on this question.