I've been doing tons of research to try to see if I can make an impact on my cycle just by changing my nutrition (Fertility, Cycles and Nutrition by Marilyn Shannon) and I read in there that preovulatory temps below 97.2 are unusual and post-O temps of less than 98 are also unusual. My temps tend to be in the 96s pre and upper 97s post. I only got into the 98s when I was pregnant or just very occaisionally. Now I'm worried that something is wrong with me. Has anyone else had this experience. Not to make it even more confusing, but my older sister has had six children, no m/cs and her temps are low like mine. I really wish I knew what was going on!