1. Feline pregnancy;Johnston,2001
2. Canine pregnancy;Johnston,2001
3. Influence of litter size and breed on the duration of gestation in dogs;Okkens;J Reprod Fertil Suppl,2001
4. Small animal theriogenology;Root-Kustritz,2003
5. Reflex lh release in estrous cats following single and multiple copulations;Concannon;Biol Reprod,1980