The gestational sac is the first structure that can be seen when a pregnancy occurs via ultrasound. Seeing the gestational sac helps to confirm a healthy and healthy pregnancy and rule out an ectopic pregnancy. In this article we will explain the answer to the question “When does a gestational sac appear on a vaginal ultrasound?”

When does the gestational sac appear in the vaginal ultrasound?

The main reason for the test Ultrasound Early pregnancy is the identification and confirmation of an intrauterine pregnancy and the rejection of an ectopic pregnancy.

In the early stages of pregnancy, a transvaginal ultrasound is more accurate than a transabdominal ultrasound, so the answer to the question “When does a gestational sac appear on a transvaginal ultrasound?” The gestational sac can be seen in a vaginal ultrasound examination about two weeks before it is seen through the abdomen, that is, it can be seen when a woman reaches the third to fifth week of pregnancy, and the diameter of the gestational sac at that time. It is between 2-3 millimeters.

It is worth noting that in case of dependence on pregnancy hormone levels, the gestational sac can be seen when its levels reach 1500 – 2000 micro international units/milliliter.

The shape of the gestational sac in the first vaginal ultrasound

In the fifth week of pregnancy, you can see the gestational sac and a sac inside it known as the yolk sac, and it is usually difficult to see the fetus at this time, but if it appears, it will be in the form of a small white, wrinkled body.

surround Passes The yolk sac is a small white sac that nourishes the fetus and produces red blood cells in the early stages of pregnancy.

As for the gestational sac, it appears in the form of a black halo, and it contains the amniotic fluid.

What if the gestational sac does not appear?

After we explained the answer to the question “When does the gestational sac appear in the vaginal ultrasound?” It is possible not to see the gestational sac in the fifth week, but this is no cause for concern, but the couple should be patient, since behind the absence of the gestational sac there are many possibilities and they are as follows:

• Do the test early

The woman may have made a mistake in calculating the start of her last period or her period or the time of its end, i.e. calculating the gestational age incorrectly, and thus the woman did not reach the fifth week of pregnancy, i.e. a common occurrence.

The reason may be that the hCG levels have not yet reached the levels where hCG can be seen, that is, they have not reached 1500 – 2000 mIU/ml.

If pregnancy hormone levels are low and the gestational sac does not appear on the vaginal ultrasound, this may have occurred abortion Early, and usually it occurs when a defect occurs in the fertilized egg, causing it not to become an embryo, and in rare cases it may occur due to problems in the uterus or cervix.

Vaginal bleeding is a common symptom of miscarriage, but it is not the only one, as it can be associated with other conditions.

• Ectopic pregnancy

If it is certain that the woman has reached the fifth week and the gestational sac does not appear here, the doctor begins to consider the possibility of an ectopic pregnancy, although it is less common, but it is dangerous and life-threatening if it is not treated. With.

It occurs when a fertilized egg implants outside the uterine cavity, usually in the fallopian tube.