Pregnant women should be aware that many examinations during pregnancy require ultrasound examination of the uterus to understand fetal development. After pregnancy, the gestational sac can be seen through ultrasound, and the normality of the gestational sac can directly determine the development of the fetus. So how long does it take to see the gestational sac in the uterus during pregnancy?
The gestational sac is a symptom of pregnancy before the fetus is fully formed, during which the original placental tissue is covered by the amniotic membrane and vascular network. The fetus has not yet formed, and when the embryo appears, the fetal heart begins to beat. The gestational sac is initially very small and gradually grows. Generally, after 5 weeks of pregnancy, a small gestational sac can be seen on ultrasound, occupying less than 1/4 of the uterine cavity, or fetal buds can be seen.
A normal intrauterine pregnancy takes about 40 days and the gestational sac inside the uterus can be seen through ultrasound. However, due to individual differences among women, some pregnant women may delay seeing the gestational sac until around 45 days. A woman with a normal menstrual cycle who cannot see the gestational sac in the uterus at 49 days of pregnancy may have an ectopic pregnancy. Women should pay attention to physical changes during pregnancy and seek medical attention promptly if discomfort is detected.
The use of ultrasound to examine the gestational sac is mainly for estimating gestational age. Based on changes in data, it is possible to promptly detect any defects in the fetus during development. Some pregnant women may experience a smaller gestational sac due to excessive stress during pregnancy, leading to incorrect ovulation and delayed conception. As a result, the gestational sac may appear smaller compared to the actual number of days of amenorrhea. This is a normal situation and there is no need to worry.
