Answers are grounded in this paper and cite their sources.
Summary. Healthy nursing mothers were treated orally with an oestrogen (ethinyloestradiol, 0·3 mg daily) or a progestagen (6-alpha-methyl-17-alpha-hydroxyprogesterone acetate, 30 mg daily) for 5 full days after birth. Milk yield was not affected. A highly significant increase in protein content was observed in the milk of oestrogen-treated mothers. Theoretical implications of these results are discussed.
No takes yet. Share an insight, caveat, or question.
Toaff et al. (1969) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: