I have experienced this personally, and I was wondering if anyone else has noticed this. I was one of those unlucky sorts who started menustration months after childbirth, even with serious nighttime nursing. My sons would get "mean" right before my period. If you're wondering if my judgment was colored by my mood at the time, this was a phenomenon that my husband and other family members noticed as well. Often they were fretfull (sp?) and put in overtime and the breast. Since I nursed my second child for 4 1/2 years, it became especially noticeable with all the heavy fits that he threw at that time. Debbie Albert, IBCLC