Had ectopic pregnancy removed on 30 Dec 2010 at 4 weeks from my left tube.my tube was not removed .had intercourse on the 1 jan and I was ovulating.had slight bleeding from the 10 jan to the 13 jan.did not seem like my periods.started postoval on the 13Jan 2011 due to a enlarged cyst on my right ovary.did a pregnancy test on the 19 Jan .which is a positive.could postoval tablets make a pregnancy test positive.this is what the nurse said.but I heard of people falling pregnant on it.