Synchronizing preimplantation embryo development up to the blastocyst stage with uterine differentiation to the receptive state is an absolute requirement for successful implantation. Molecular ...

More frequent coitus around the time of implantation could potentially lower the probability of a successful pregnancy by disturbing the development and implantation of the blastocyst.

Further cell divisions lead to the formation of the primitive endoderm, which forms a blastocyst. This structure implants around one week after fertilization. As development continues, the epiblast ...

This mechanism to temporarily slow development, called embryonic diapause, often happens at the blastocyst stage, just before the embryo implants in the uterus. During diapause, the embryo remains ...