15 days after intercourse, a gestational sac was seen on ultrasound

Having sex 15 days ago is roughly within the 4th week of pregnancy. At this time, many pregnant women are eager to know what their babies look like. Therefore, many women actively use B-ultrasound to check how big their gestational sac is. So can the fetal sac be seen by vaginal ultrasound 15 days after intercourse?

Can the fetal sac be seen by transvaginal ultrasound 15 days after intercourse?

Generally, the gestational sac can only be seen by ultrasound 6-8 days after menstruation. 15 days after you had sex, the sperm and egg combined and the embryo implanted, and you cannot see the gestational sac by B-ultrasound.

At what stage of pregnancy can the gestational sac be seen through ultrasound?

1. The gestational sac is the initial shape of pregnancy. It is a small test tube embryo in which the initial embryonic tissue is encapsulated by the amniotic membrane and vascular network. The baby had not yet been born at that time, but the fetal heartbeat had already begun when the embryo bud and fetal heartbeat appeared.

2. At the beginning, the gestational sac is very small, and then it gradually grows bigger. Under normal circumstances, 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 the fetal bud and fetal heartbeat can be seen from it. 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 and the early or late pregnancy time, some pregnant women may not be able to see it until around 45 days.

3. Generally, when hCG reaches 1000U/L, vaginal ultrasound should be able to identify the intrauterine gestational sac. This time 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 normal menstrual cycle is reached and the intrauterine gestational sac is not seen on the 49th day of pregnancy, ectopic pregnancy should be suspected.

According to the detailed introduction in the article, it can be understood that the gestational sac cannot be seen by transvaginal ultrasound at 15 days of pregnancy, because the gestational sac is still very small at this time. If you want to use B-ultrasound to see the gestational sac, it is recommended that you do it after 5 weeks of pregnancy. Only then can you see the small gestational sac in the belly, which can let you know what your baby looks like.