Both usually produce few young at one time, and ensure their survival by caring for them. Unlike mammals, birds lay eggs and initial stages of development occur outside the mother’s body. Reproductive ...

In mammals, male and female reproductive structures are found in separate individuals. If an egg is fertilised by a sperm in the oviduct then it divides a number of times then implants into the ...

The biological factory that produces reproductive cells has a robust quality control system to identify and ... control mechanisms could operate in mammals, including humans.

have identified a neural circuit in the brain that governs sexual rejection in female mammals, providing key insights into the mechanisms shaping social and reproductive behaviors. The study ...