No gestational sac in the uterus during 40 days of pregnancy

After you become pregnant, you can see the gestational sac during B-ultrasound examination. The gestational sac is the place where the baby is nurtured. Usually, it is just a gestational sac at the beginning of pregnancy, and the gestational sac will appear around forty days of pregnancy. However, some women may find during examination that there is no gestational sac in the uterus at 40 days of pregnancy. It is not normal to have no gestational sac in the uterus at 40 days of pregnancy. Why does this happen?

Can't see the gestational sac in 40 days of pregnancy

If the gestational sac is not seen during the B-ultrasound at 43 days of pregnancy, a blood test will show that the chorionic gonadotropin value is 607 and the progesterone value is over 7. Then this situation may be a biochemical pregnancy. That is to say, after pregnancy, the fertilized egg stops developing. After 43 days of amenorrhea, an ultrasound examination at the hospital showed no heart beat, blood HCG 697, and progesterone 7.03, which were low and could not rule out an ectopic pregnancy. At present, since no gestational sac is seen and pregnancy cannot be ruled out, the fetus cannot be preserved and we can only continue to observe. It is recommended to repeat the B-ultrasound in one week.

How long does it take for ultrasound to show the gestational sac?

1. The gestational sac is the initial form of pregnancy. It is a small embryo wrapped in the original placental tissue by the amniotic membrane and vascular network. The fetus had not yet formed at that time, but the fetal heartbeat was already there when the embryo bud appeared.

2. The gestational sac is very small at the beginning and then grows slowly. Generally speaking, after 5 weeks of pregnancy, a small gestational sac can be seen on B-ultrasound, which occupies less than 1/4 of the uterine cavity, or a fetal bud can be seen. If it is a normal intrauterine pregnancy, the gestational sac can be seen in the uterus through B-ultrasound around 40 days of pregnancy. However, due to individual differences in the time of conception, some pregnant women may not be able to see it until around 45 days.

3. Usually , when HCG reaches 1000U/L, vaginal ultrasound should be able to identify the intrauterine gestational sac. This is around the 4th or 5th day of the 5th week of pregnancy. When HCG reaches 6500U/L, abdominal ultrasound can identify the intrauterine gestational sac. Therefore, vaginal ultrasound will be more accurate. If the intrauterine gestational sac is not seen on the 49th day of pregnancy during a normal menstrual cycle, ectopic pregnancy should be suspected.

The above is the editor’s summary of relevant information on the issue of not being able to see the gestational sac at 40 days of pregnancy. For any abnormal conditions that occur, mothers must ask their doctors in a timely manner. They should not allow problems to persist after leaving the hospital and should reduce the occurrence of problems. Be sure to tell your doctor about the condition of your gestational sac and see what treatment advice the doctor gives.