虽然从胎盘的重量和营养看，胎盘好象起到重要的作用，但是调控胎盘催乳素分泌的确切因素尚不明确。
The precise factors that modulate secretion of are unknown, although placental mass and nutrition seem to play a role.
虽然从胎盘的重量和营养看，胎盘好象起到重要的作用，但是调控胎盘催乳素分泌的确切因素尚不明确。
The precise factors that modulate secretion of are unknown, although placental mass and nutrition seem to play a role.
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