Can metformin cause bleeding a week after it has been taken? i got a positive ovulation test cd25, same night i started spotting.

Probably not: There is no reason to think that metformin could cause bleeding in pregnancy.

Incidence0.01to0.03%: This was reported incidence of thousands who were given Metformin.It was reported 1to3 in 10000 I have not seen comparison to placebo.But it seems very low chance from metformin in my view

Mitlemirtz (? Sp): Sometimes the Spotting with Ovulation happens. Metformine brings Blood sugar down. It is also used for Polycystic Ovary syndrome