It’s all about timing: is the window of implantation different for day 5 and 6 blastocysts?


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Volume 114, Issue 1, Pages 69–70


Helen H. Kim, M.D., Karine Matevossian, D.O.


Reflections on "Frozen-warmed blastocyst transfer folloowing six or seven days of progesterone administration: impact on live birth rate in hormone repacement therapy cycles" by Roelens et al.

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Fertility and Sterility

Editorial Office, American Society for Reproductive Medicine

Fertility and Sterility® is an international journal for obstetricians, gynecologists, reproductive endocrinologists, urologists, basic scientists and others who treat and investigate problems of infertility and human reproductive disorders.