12 weeks pregnant, doctor says it's a girl

Generally speaking, the 12th week of pregnancy is in the early stages of pregnancy. At this time, the fetus's limbs and brain are not fully developed. However, the condition of the fetus can be determined through some diagnostic methods, such as B-ultrasound and observation of the gestational sac. In addition to being able to tell the condition of the test tube embryo, can you also tell the gender of the baby? Can you tell whether a baby is a boy or a girl at 12 weeks of pregnancy?

Can you tell if you're a boy or a girl at 12 weeks of pregnancy?

1. Amniocentesis

There are many ways to assess men and women during pregnancy, and amniocentesis is one of them. Around 16 weeks of pregnancy, amniocentesis is performed to extract the amniotic fluid of the pregnant woman for special examination. After examination, if the chromosomes are xx, the fetus is female; if they are xy, the fetus is male.

2. Diagnosis by B-ultrasound

Diagnosis using B-ultrasound can not only check the gender of the fetus, but also see whether the fetus suffers from microcephaly, meningocele, hydrocephalus and other diseases that seriously hinder brain development. It can also check whether it is twins, hydatidiform mole and ectopic pregnancy. This is a highly accurate testing method that does not harm the fetus or pregnant woman.

3. Check the X or Y chromosome of hcg somatic cells

By checking the X or Y chromosome of hcg cells, the sex of the fetus can be predicted in the early stage with an accuracy of more than 90%. When the reproductive organs of the fetus can be distinguished, immediate observation with a fetoscope can also determine the sex of the fetus.

Is it reliable to know whether it is a boy or a girl by looking at the shape of the gestational sac?

Scientific research has deciphered: the gestational sac is a sac-like structure formed after the sperm and egg combine and the embryo implants in the uterine wall, and the uterine decidua completely covers the combination of sperm and egg. It is the initial form of test tube embryos. Around 5 weeks of pregnancy, a clearer shape of the gestational sac can be seen through B-ultrasound, which is considered the most accurate indicator of the early pregnancy.

The specific shape of the gestational sac has nothing to do with the gender of the fetus. It is basically a three-dimensional sphere or ellipsoid, and the gestational sac we see under B-ultrasound is just a cross-section of the three-dimensional structure. Anyone who knows a little about geometry should know that the shape will be different if the selected cross-section is different. Therefore, there will be a situation where two gestational sacs with similar shapes appear completely different on B-ultrasound because the embryos are implanted in different places.

Statistics show that the common shape of the gestational sac under B-ultrasound is mostly ring-shaped or oval, and sometimes it appears to be long and narrow, but in fact the gender ratio is close to 1:1. The claim that judging the gender of a woman by the shape of the gestational sac has no scientific basis. It is just gossip among pregnant mothers after dinner and cannot be taken seriously.