The gestational sac has become smaller and the embryo has grown larger.

The gestational sac can only be seen in the early stages of a woman's pregnancy. In the early stages of a woman's pregnancy, if there are emotional anxiety and other reasons, it is easy to cause the gestational sac to shrink. Because the normal gestational sac will affect the normal growth and development of the test tube embryo, everyone is worried about whether the health of the fetus will be affected. What is the reason for the shrinkage of the gestational sac?

What causes the fetal sac to shrink?

First of all, due to psychological anxiety and other reasons, pregnant women's menstruation is delayed, ovulation is delayed, and pregnancy time is late, resulting in the fetal sac being smaller than the actual amenorrhea days. For example, the menstruation has not stopped for 50 days, but during examination it is found that the gestational sac is only about 40-day size. This kind of small gestational sac is normal. If the dynamic examination after one week shows that the chorionic gonadotropin and progesterone are gradually increasing, the gestational sac is continuing to grow, and the embryo bud, fetal heartbeat and fetal heartbeat gradually appear, it means that the small gestational sac is caused by physiological reasons such as delayed ovulation and late pregnancy, and you can continue to get pregnant.

Secondly, due to incomplete development of sperm and egg cells, infection of chlamydia, mycoplasma, rubella virus during pregnancy, or exposure to harmful substances during pregnancy, the fetal sac may be incompletely developed and shorter than the normal month. For pregnant women who experience the above conditions, the gestational sac will continue to grow over time during pregnancy, and only the embryo bud, fetal heartbeat and fetal heartbeat can no longer be seen. The gestational sac in this situation is unhealthy and will eventually cause miscarriage.

Finally, it should be noted that after the gestational sac shrinks and then grows in the early stages of pregnancy, it usually does not shrink and then grow again. As long as the fetal heartbeat can be seen, it means everything is normal. If the fetal sac shrinks, it may be related to the cessation of fetal growth and development. You need to go to the hospital for regular follow-up diagnosis and diagnosis. If the fetus has stopped growing and developing, you need to choose curettage surgery for treatment in time.

The whole process of fetal sac production

An empty gestational sac means that the test tube embryo has not grown and developed well. There are many reasons for this, such as the poor quality of sperm and environmental factors that affect the embryonic development process. Sometimes an empty gestational sac occurs when the sperm and egg combine late. The gestational sac is only seen in early pregnancy. For women with standard menstruation of 28 to 30 days, the gestational sac can be seen in the uterine cavity by B-ultrasound after 35 days of amenorrhea. The diameter of the gestational sac is 2 cm at 6 weeks of pregnancy and about 5 cm at 10 weeks of pregnancy. It is normal for the gestational sac to be located at the fundus, front wall, back wall, top, or center of the uterus; it is normal for the shape to be circular, oval, and clear; if the gestational sac is irregular in shape, unclear, and located at the bottom, and the pregnant woman also has abdominal pain or vaginal bleeding, she may have a miscarriage.