An unusual growth mark in an ancient bone may help resolve a longstanding mystery surrounding the origins of mammalian ...

Sperm capacitation represents the final maturation phase that mammalian spermatozoa undergo after ejaculation, during which they acquire the capacity to fertilise an oocyte. This multifaceted process ...

Early pregnancy in mammals encompasses a tightly regulated sequence of events beginning with fertilisation of the oocyte, formation and transport of the blastocyst, and its eventual implantation into ...

Some female birds, reptiles and other animals can make a baby on their own. But for mammals like us, eggs and sperm need each other. Parthenogenesis could be the future for this California condor ...

・A 236-million-year-old cynodont fossil from Argentina contains evidence that the animal may have given birth to live young rather than laying eggs. ・Bone growth patterns and estimated newborn size ...