Maintenance of Pregnancy in Absence of Dietary Protein with Progesterone 1

Abstract

Summary

Pregnancy was maintained to term in protein-deficient rats when 6 mg of progesterone were injected daily from days 3 to 10. It is suggested that adequate amounts of circulating estrogen were present during the first half of pregnancy and that placental luteotropin stimulated adequate production of both estrogen and progestin during the latter half of gestation.