I am 6 weeks and 2 days pregnant, with six weeks I had a vaginal ultrasound because I thought it was wrong, only because the pregnancy symptoms, like sensitive breasts were declining. (2nd IVF with fresh embryo, first was miscarriage). I am also taking utrogestan. Can utrogestan prevent a miscarriage to happen, when the embryo actually isn't okay? On the vaginal ultrasound the doctor could only see the gestation sac and yolk sac, but no embryo.