F. Goeritz

Pregnanolone appearance coincides with the period of implantation following embryonic diapause in the roe deer.

Roe deer (Capreolus capreolus) are seasonal animals with fertilisation taking place in summer (July/August). Thereafter, the embryo enters a 4-5-month period of embryonic diapause. This reproductive strategy, displaying a reduced embryonic developmental velocity at the blastocyst stage, leads to reactivation and implan...