Potential Use of Follicles in the Ovary to Increase endogenous Secretions of Estrogen and Progesterone during Pregnancy in Improving Reproduction and Production Performances of Mammalian Animals

The productivity of mammalian animals is determined by the success of reproduction process to produce healthy and superior off spring with better growths and developments from birth to weaning until maturity. The fitness and health of the newborn off spring until maturity is determined by the growth and development during prenatal period with the final results of improved birth weight. The main limitations in animal production are the low birth weight and the survival or fitness of the newborn off spring. The number and the weight of weaned off spring are determined by the birth weight, survival during pre-weaning growth, and milk production during pre-weaning or lactation period.