Hi everyone Marie Davis asked for a medline search about an article. Thanks to my husband, the best scientific literature searcher,I can now provide the full reference. (BTW it was not yet on Medline) Suppression of Hypothalmic-Pituitary-Adrenal Axis Responses to Stress in Lactating Women. Margaret Altemus, Patricia A. Deuster, Elise Galliven, C. Sue Carter and Philip Gold. Journal of Clinical Endocrinology and Metabolism Volume 80, no, 10, 2954 - 2959, (1995). It is a carefully done study whose "results indicate that stress -responsive neurohormonal systems are restrained in lactating women." The stressor was exercise. Sarah Friend Barnett, M.A., LLL leader, IBCLC Bronx (New York City), NY [log in to unmask]