Fee, I used a similar product (it was a little estrogen tablet that you inserted once a day). I started when DD was a bit older than 6 months and continued to BF like normal. My Dr assured me that the dose is so small and topical that the BM impact would be negligible. I noticed no difference whatsoever! Anyway, it was kind of a case of needing to put my well being first, as I was in a pretty bad way!