1. The corpus luteum and its control;Niswender,1988
2. Corpora lutea of the large domestic animals;Hansel;Biol Reprod.,1973
3. Neuroendocrine control of the ovine estrous cycle;Goodman,1988
4. Pregnancy;Heap,1984
5. Hormonal mechanisms in pregnancy and parturition;Catchpole,1991