Date Published:Sep 8
The evolution of placentas in poeciliid fishes is associated with conception of overlapping litters and male mating strategies becoming more coercive. Sperm competition in ovaries of multiply-inseminated females may favor fertilization of immature eggs during ongoing pregnancies.
Haig, DavidengCommentEngland2014/09/10 06:00Curr Biol. 2014 Sep 8;24(17):R805-8. doi: 10.1016/j.cub.2014.07.039.