Can't remember where I read this but it is not unusual for moms to lose significant quantities of hair starting 3 months postpartum. I wish I could remember the details but it is to do with the hair follicles not going into their rest phase during pregnancy -- hence the lovely thick hair so many pregnant women enjoy. With the dramatic drop in estrogen at birth the hair follicles that are overdue to rest all do so. It takes three months then the hair that was growing in these now resting follicles falls out -- in great quantities for some women. By the end of a year all is stable and hair is back in normal rest/growth cycles. Joanna Koch IBCLC in Los Altos, CA