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S. Holtze

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Review Open access Sep 2026

Spermatology of the giant panda (Ailuropoda melanoleuca): Morpho-functional traits, reproductive adaptations, and new insights into sperm cryoresistance.

The giant panda serves as a clear example of the critical role zoological institutions play in conservation programs for endangered wildlife. It is the bear species whose reproductive biology is best understood, and for which the greatest advances in reproductive technologies have been achieved. This review describes v...

J. Santiago-Moreno, E. Martínez-Nevado, C. Castaño et al. · 0 citations
Open access Jul 2026

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...

Sara Elsafadi, Haolin Chen, R. Giacometti et al. · 0 citations

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