The twins are joking in their bellies.

If having children is a further sublimation of love and a great crystallization of love, then the young couple who are pregnant with twins are not even more blessed. The pediatric hospital where my classmates went to work admitted a pregnant woman with twins. When she first came for a routine pregnancy test, the whole family was beaming. Obviously, happiness was on her face.

After a while, I came to my classmate's hospital for a pregnancy test again, only to find that there was only one child's shadow in the influence of scanning. Where's the other kid? Maybe a fraternity. The young couple looked at the doctor piteously and thought about it.

After the doctor told the truth, I was half-relaxed and half-sighing, just like the young couple, after listening to these magical knowledge from my classmates. It turns out that this sensational phenomenon is defined by a special medical term: twin disappearance syndrome.

The doctor saw the young couple's confused little eyes, which further explained this overly technical term. In fact, among pregnant women with a large base, the probability of having two children is not as small as everyone thinks. As for why only one child is born, it is because some have two fertilized eggs, and then one will absorb the other. It is said that natural selection, survival of the fittest, or an undisclosed disease. In the medical field, it is undeniable that this phenomenon exists, even if the incidence rate is not high.

The disappearance of twins is not only the law of the jungle, but also twin transfusion syndrome, because one of the fetuses is incompatible with the mother's blood type, causing immune rejection. Twins share a placenta and usually live in peace, but if one of them is strong enough to get the upper hand in the competition for blood oxygen and nutrition, the other will get more and more tired until the atrophy disappears.

Don't worry too much. This happens in the early stage of pregnancy. Taking appropriate measures has little effect on adults and children, but if it is discovered after more than three months of pregnancy, the risk factor will increase greatly. This is undoubtedly reminding all expectant mothers of the necessity and importance of regular pregnancy tests.