Is it possible to see a gestational sac 20 days after implantation?

Patient's question:

No

Doctor's answer:

In this case, it is not possible to immediately see the gestational sac. There is usually a process involved in the formation of the gestational sac, which takes about 2 weeks after the menstrual period. It is generally around 45 days when an ultrasound can confirm whether pregnancy has occurred.