Is it common not to see an embryo on a 6 week scan?

No, it is not common not to see an embryo on a 6-week scan. An embryo should typically be visible on a vaginal ultrasound at 5-6 weeks gestation. If an embryo is not seen on a 6-week scan, it could indicate a number of possibilities, including:

- The pregnancy may be earlier than thought, and the embryo is too small to be seen.

- There may be a problem with the pregnancy, such as a miscarriage or ectopic pregnancy.

- The ultrasound may not be able to clearly visualize the embryo due to factors such as the woman's weight, uterine position, or bowel gas.

It is important for a doctor to interpret the ultrasound findings and provide an accurate diagnosis. If an embryo is not seen on a 6-week scan, the doctor may recommend repeating the ultrasound in a few weeks to see if the embryo has developed further.