The fact that the pregnancy sac is not visible under ultrasound at the beginning of pregnancy may be related to the fact that the pregnancy is too short or the location of the fertilized egg.
1. Some women have irregular menstrual cycles or the pregnancy period is too short for the gestational sac to reach the uterine cavity or the gestational sac is too small to be detected under ultrasound. If the pregnancy sac is not detected due to a short gestation period, it is recommended that the patient be rechecked after one week.
2. Some patients have been pregnant for a long time, but the gestational sac is still not visible in the uterine cavity, it is possible that the fertilized egg has been deposited in a place other than the uterine cavity, and it is considered that it may be ectopic pregnancy. It is recommended that the patient ultrasound examination of the adnexal parts of the pregnancy sac, blood test HCG level.
It is recommended that the patient should go to the hospital for regular checkups after pregnancy to avoid abnormal development of the fetus.