In an early pregnancy scan of about 5-6 weeks pregnancy, gestational sack, yolk sack and fetal pole should be visible in trans-vaginal ultrasound. Visible fetal pole is the 1st sure sign of pregnancy, and a developing embryo. A fetal heart should also be visible by that time. Sometimes, it is difficult to see a fetal pole and a fetal heart at this time between 5-6 weeks of pregnancy, because sometimes the sinologist interpretation or the machine resolution. There is no other signs of fetal abortion, one can wait for about 2 weeks, it also may be caused by wrong dates, so there is no harm in waiting for about 2 weeks, and in an anxious patient, serum beta HCG, a pregnancy hormone can be checked, and it can be repeated after 48 hours to look for doubling of the values, which is a confirming sign of pregnancy. It will also be wise to rule out any atrophic pregnancy or hetrotrophic pregnancy i.e simultaneous pregnancy in the tubes and ovaries or elsewhere outside the uterus.
