How long does it take for the gestational sac to reach the uterus?

Generally speaking, it takes about seven to nine days for the gestational sac to reach the uterus. It takes some time for the fertilized egg to enter the endometrium after fertilization. However, at this time, the gestational sac may only be pulsating, and the shape of the gestational sac in the uterus cannot be seen. The shape of the gestational sac can be seen in the uterus around the fourth to sixth week. The gestational sac generally does not move after it reaches the uterus, but it can grow. About five months into the pregnancy, pregnant women will begin to experience symptoms of fetal movement.

The gestational sac is also considered a product of ectopic pregnancy.

If the fertilized egg fails to enter the uterus at 7 days due to inflammation, adhesion or other factors, ectopic pregnancy will usually result in heavy bleeding and the fetus will generally not survive. The baby's mother herself was having an intrauterine pregnancy, but due to poor development of the uterus, the gestational sac broke through the weak top of the uterus and entered the abdominal cavity. The villi around the gestational sac sought nutrients everywhere in the abdominal cavity and then supplied them to the fetus through the placenta. Usually, such a fetus will die within two months because it has no protection from the uterine environment and lives in an extremely harsh environment with poor nutrition.

The gestational sac is only seen in early pregnancy.

For women who have regular menstruation of 28 to 30 days, after 35 days of amenorrhea, the gestational sac can be seen in the uterine cavity by B-ultrasound. The diameter of the gestational sac is about 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, upper part, or middle part of the uterus.

A round, oval, and clear shape is normal; if the gestational sac is irregular, blurred, and located in the lower part, and the pregnant woman also has abdominal pain or vaginal bleeding, she may have a miscarriage. The gestational sac is the primitive placental tissue, a small embryo wrapped by the amniotic membrane and vascular network.

The gestational sac is the initial form of pregnancy.

The fetus had not yet formed at that time, but the fetal heartbeat was already there when the embryo bud appeared. In the second week, the embryo implants in the endometrium. When it develops into the second germ layer, a large cavity called the primary yolk sac appears on the ventral side of the embryonic disc. The yolk sac continues to shrink and degenerate during embryonic development, but the extraembryonic mesoderm on the wall of the yolk sac is the earliest origin of the formation of blood cells, blood vessels and primitive germ cells - the gestational sac, where the fetus will grow in the future.