Occurrence of two phases of return to oestrus in sows on commercial units.
Glossop
C E
CE
Ministry of Agriculture, Fisheries and Food, Reading Cattle Breeding Centre, Shinfield.
Foulkes
J A
JA
D000818:Animals; D004971:Estrus / Q000502:physiology*; D005260:Female; D013552:Swine / Q000502:physiology*; D013997:Time Factors