It happens that a woman simultaneously ripens 2 eggs and leaves the bursting follicles, and if at this time there is an unprotected sexual intercourse, then such a woman can become pregnant with twins. In this article, we will consider how and when on ultrasound examination of ultrasound, twins are seen.
When does ultrasound show twins?
Doubling on ultrasound in most cases is visible already at the 5th week of pregnancy, when the embryo is implanted into the uterus and the fetus begins to be visualized. An early ultrasound is prescribed by a gynecologist when it detects a rapid increase in uterine size with an internal obstetric examination. If the embryos are identical twins, then they will not be visible on ultrasound for at least 12 weeks. Ultrasound in pregnancy is prescribed every month, in order to diagnose the complications that have developed in time. Definition of twins by ultrasound in the early term can be difficult due to any peculiarities of the location of embryos in the uterus and the quality of ultrasound equipment (new ultrasound devices have higher capabilities for visualization).
What does twins look like on different terms of pregnancy?
So, we have already found out that often twins on ultrasound in 5 weeks of pregnancy are visualized as 2 dark spots located in the uterine cavity. If the woman did not suspect, about the presence of her several fruits in the womb, then for the first time she can learn about this at the first screening ultrasound in pregnancy at 9 weeks. During this period, the embryos already divided fingers on the handle, the umbilical cord is defined and one or two placentas are formed. US twins at 11 weeks allow you to see a slightly reduced for their term embryo size, approximately
It is known that one of the 80 pregnancies is prolific. Such a pregnancy can be suspected of a marked toxicosis, a rapidly growing uterus, but the most reliable method for diagnosing a multiple pregnancy is an ultrasound that can detect twins as early as week 5.