What is the required number of embryos for a successful Invitro?

What is the required number of embryos for successful InVitro fertilization ? In 2020, the best in vitro fertilization programs in the world do three things. First, they grow the embryos until they reach the blastocyst stage, which usually takes 5 to 7 days. Second, all embryos are frozen for so-called frozen transfer, and third, …

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