Heteropaternal superfecundation frequently occurs in multiple‐bearing mob‐mated sheep

Summary Heteropaternal superfecundation may be defined as the fertilisation of two or more ova during the same oestrus cycle as a result of more than one coital act from different males; this results in foetuses being born in the same litter of the same age but different paternity. Heteropaternal superfecundation is more likely to occur in poly‐ovulatory species like sheep; moreover, female sheep are often mob‐mated with several rams...