This is because the maternal blood after delivery due to estrogen and progesterone concentrations significantly decreased prolactin will play a catalytic role in lactation, to secrete milk.

• 这是因为产妇分娩后由于血液中雌激素和孕激素的浓度大大降低，催乳素才会发挥促进泌乳的作用，促使乳汁分泌。