Production of rats in synchronised batches.
Successful synchronisation of copulations and births for the 1st parity permit continued synchrony of parturitions in subsequent parities. Foetal implantation after post-partum copulation was delayed by multiples of the oestrous cycle; both season and number of sucking neonates influenced the time of implantation. Post-weaning matings gave a high conception rate with a parturition spread of 36 hours for 94% of the original group.
D000818:Animals; D001947:Breeding; D003307:Copulation; D004054:Diethylstilbestrol / Q000494:pharmacology; D010064:Embryo Implantation / Q000187:drug effects; D005260:Female; D005306:Fertilization; D007743:Labor, Obstetric; D008098:Litter Size; D008297:Male; D010298:Parity; D011247:Pregnancy; D051381:Rats / Q000502:physiology*; D013997:Time Factors; D014886:Weaning
D004054:Diethylstilbestrol