The most accurate time is between 8 and 11 weeks gestation. Trying for a baby? Your midwife or doctor will refer you for a scan and they will advise you as to the best time to attend the scan. You be the judge. This includes the skull, the brain, that there are two arms, two legs, the heart, stomach, bowel, pelvis and bladder. So you can see all his organs, muscles, limbs and bones are in place, and the sex organs are well developed too. The aim is always to check on the health of you and your baby, but it can sometimes be overwhelming and confusing.
Time for your 12-week scan? Here's what to expect...
Your midwife or doctor will refer you for a scan and they will advise you as to the best time to attend the scan.
7 Week Ultrasound
What best describes you? Dating scan Print. Pregnancy tests information video myVMC.