________ stimulates milk production, but __________ stimulates milk letdown. 23:35 Biology ________ stimulates milk production, but __________ stimulates milk letdown.a. Progesterone, estrogen b. HCG, oxytocinc. Prolactin, oxytocind. Prolactin, estrogene. Prolactin, progesteroneAnswer: c Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+