The fluctuations of hormones during the menstrual cycle do have an impact on immune function and also on the metabolism of drugs. Women react differently to medications depending on what point in their cycle they take them. There is a dampening of the intensity of the immune system that happens at the time when a new fertilized egg is implanted. It’s very important in the physiology of women, and this obviously does not happen with men.
Dr. Marianne J Legato Professor of Clinical Medicine, Columbia University
Dr. Marianne J. Legato is an academic physician, author, lecturer and specialist in women's health. She's Professor of Clinical Medicine at Columbia University College of Physicians & Surgeons and Founder/Director of the Partnership for Women’s Health. more about this expert »