In experienced hands, it may be detected as early as 30 days gestation by TVU.
At 4 weeks and 3 days, a tiny gestational sac becomes visible within the decidua.
It may not be easy for you to make out what you are seeing on the screen in the early scans.
You may have a earlier scan, if you are experiencing pain or bleeding for example or unsure of LMP dates.
It is also used to assess the amount of amniotic fluid surrounding the baby and record the position of the placenta.
The first trimester is months one, two, and three of your pregnancy.
Around week 20 of pregnancy, an anatomy scan is performed to rule out abnormalities that can be visualised with ultrasound imaging such as cleft lip, spina bifida, heart defects, and many other abnormalities.
It is also used to check that the fetus size is within normal limits and record the location of the placenta.