6 weeks pregnant without yolk sac normal?

6 weeks of pregnancy without yolk sac is normal, need to judge according to the specific situation. Most women in 6 weeks of pregnancy, can be detected by B ultrasound embryo and yolk sac, but if the menstrual cycle before pregnancy is relatively long, may be due to delayed ovulation caused by 6 weeks of pregnancy did not appear yolk sac, if wait 1 week after the successful review of ultrasound to see yolk sac, indicating that is normal.

If the yolk sac has not appeared all the time, it is necessary to be highly alert to the possibility that the embryo is dysplastic or the embryo stops developing, which is an abnormal phenomenon. It is necessary to find out the cause and carry out targeted treatment.