For example if you a tiny sac can be seen in the uterus, but the baby and its heart beat may not be detected yet.
My cycle was very irregular and I did not know how far long I was. I had a m/c last August and the same thing happen to me. But with my frist u/s at 6 wks 5 days we saw a heart beat.
The earlier the ultrasound is done, the more accurate it is at estimating the baby's due date.
Obstetric Ultrasound is the use of ultrasound scans in pregnancy.
It is to check that your baby is growing and developing normally.
Scans are usually performed by a doctors, midwives or radiographers who are specially trained in ultrasound, and are known as sonographers.