Hello. My last period was 18.08.2017. and now I am 7 weeks and 1 day
pregnant. I was on foliculometry and I know I ovulated 31.8. or 01.09. When I went to my gynecologist in 5 weeks and 4 days there was gestational sac 7,7mm long. In 6 weeks and 3 days only gestational sac was seen and measured 5mm x 10mm. My gynecologist says according to ultrasound that I am one week less pregnant than by my last period. How can this be possible if I didn t have late ovulation? Thanks in advance