When can identical twins be detected?

Identical twins can usually be detected by B-ultrasound around 13 weeks of pregnancy, while fraternal twins can be detected earlier, usually around 7-8 weeks of pregnancy. Generally speaking, an ultrasound after 45 days of pregnancy can detect whether the baby is twins. B-ultrasound examination can show two gestational sacs as early as 7-8 weeks of pregnancy. After 13 weeks, it can clearly show the high head position of two fetuses, and the relative spine, trunk, body, etc. can be seen.

When can identical twins be detected?

Identical twins can be detected by B-ultrasound around 13 weeks of pregnancy.

Some expectant mothers wonder if they are holding twins because they have severe morning sickness or a larger abdomen in the early stages of pregnancy. At this time, it can be detected through B-ultrasound examination. Generally, fraternal twins can be detected when they are about two months old, because fraternal twins have two gestational sacs, which is very obvious. It will be relatively late to detect identical twins, because the two babies are in the same gestational sac, so we have to wait until the babies have fetal buds and fetal heartbeats to see whether they are twins. Generally, around three months, that is, around 13 weeks of pregnancy, you can clearly see whether it is a single baby or twins. At this time, you can clearly see that the heads of the two fetuses are in a high position, and you can see their relative spines, torsos, bodies, etc. Therefore, identical twins can be detected by B-ultrasound around 13 weeks of pregnancy.

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When can identical twins be diagnosed: the difference between identical twins and fraternal twins

Identical twins: Identical twins are formed when the same sperm and egg combine in the uterus but before the embryo implants, they break into two cells, and each of them implants and grows into an adult. Their genes are 100% identical, so they have the same gender and seem to be made from the same mold. Sometimes even their parents cannot tell the difference. This kind of similarity is not only similar in appearance, but also in blood type, IQ, and even some physiological characteristics, and genes that are susceptible to diseases. The so-called conjoined twins are actually identical twins, which are only connected in some places because of the incomplete division of the fertilized egg.

Fraternal twins: Women ovulate once a month, and sometimes for some reason two eggs are released at the same time and fertilized at the same time, resulting in two different sperm and eggs combining. The combination of these two sperm and eggs each has its own set of embryos, which have little connection with each other. They are called fraternal twins. Fraternal twins may have different genders, appearances and other external characteristics, just like our common twins.