6 weeks pregnant ultrasound has a small gestational sac compared to gestational age?

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Hello doctor! Let me ask you on 13.11.20 I went for an ultrasound, the doctor told me that I am 6 weeks pregnant, the gestational sac is small compared to the gestational age. The doctor prescribed medicine for me and scheduled an ultrasound in 2 weeks. So the doctor asked me, is it okay to have an ultrasound at 6 weeks pregnant with a small gestational sac compared to gestational age? I got my period on September 17, 20, my period is irregular. I'm pregnant for the second time. Thank you doctor, I am very worried!
Banh Thi Ngoc (1989)

Answer
Hello, the doctor would like to answer the question: "Is it okay to have a small gestational sac at 6 weeks of pregnancy? ” as follows:
Because you can't see all of your ultrasound results, the doctor doesn't know if that ultrasound has seen the embryo, has a fetal heart? In some cases of the same gestational age as your fetus, the ultrasound doctor finds that the size of the gestational sac does not correspond to the gestational age, but if the embryo is clearly seen, the gestational age will be calculated according to the embryo size, and if this embryo has a clear fetal heart This is always a good thing, but the doctor will also schedule an ultrasound 1-2 weeks later to continue to monitor the development of the fetus and the change of the amniotic sac.
If you still have questions about whether your pregnancy is developing normally or not, you can go to a hospital of Vinmec Health System for an examination. Thank you for trusting and sending questions to Vinmec. Wishing you lots of health. Best regards!

Answered by Specialist Doctor I Nguyen Thi Minh Huyen - Obstetrician and Gynecologist - Department of Obstetrics and Gynecology, Vinmec Nha Trang International General Hospital