Hi I am currently 15 weeks pregnant. I'm still running 4 times a week, 4-5 miles at a time. I'm really starting to struggle with keeping my heart rate under control. I know that all the more recent studies have shown that it's fine to continue running as long as you stick to what you were doing before. Since finding out I was pregnant I have stopped doing any speed work or long runs and have been doing all my runs at what should be an 'easy' pace for me and recently have slowed down considerably more. I am finding that it is getting really hard to keep my heart rate anywhere near normal rate even when I am just plodding along. I don't know if I should let it bother me, after all if I didn't have the heart rate monitor then I would just plod along at a pace I could mange without stressing! Could anyone who has run through pregnancy share their experiences or offer any advice? Thanks.