Unclear : Implantation failures can result from the following: 1. Abnormal embryos that are transferred 2. Difficult embryo transfer 3. Abnormal uterine cavity 4. Hormonal abnormalities.
Answered 3/5/2013
5.6k views
Don't know: Many speculative reasons can be given that are very complicated. But in actuality the true reason that implantation fails is the "black box" question that still alludes us.
Answered 11/27/2014
5.6k views
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