Research overview: litter size and reproductive synchrony in lion prides

Lionesses in a pride often conceive and give birth at similar times, producing synchronized litters that are reared communally in a creche. This overview surveys the determinants of lion litter size and the causes and consequences of birth synchrony. It examines how synchrony arises after pride takeovers and infanticide reset the reproductive cycles of resident females, and how communal nursing and joint cub defense improve survival. The review considers how litter size interacts with food availability and creche dynamics to determine how many cubs reach independence. These reproductive features are tightly linked to the lion's unusual social system and to the evolutionary pressures imposed by male turnover and cooperative female care.