How is the baby's head and thighs short?

Most of them are caused by parents' genetic inheritance, and infants have genetic variation due to ionizing radiation. If pregnant women have bad habits such as smoking, drinking and taking drugs, it will also cause abnormal development of the fetus during development. So pregnant women need to get rid of their bad habits.

Some fetuses have short heads and thighs, which is caused by genetic inheritance. Genes are one of the foundations for the formation of fetal appearance and appearance. If both parents are big-headed and short-legged, the chances of the fetus inheriting this gene are very high. Not only parents' genes will be passed on to children, but grandparents' genes may also be passed on to the fetus, so if there are many people with short heads and thighs in a family, the probability of short heads and thighs of the fetus will increase.

Pregnant women have many bad habits during pregnancy, such as long-term drug abuse, long-term smoking, alcoholism and so on. These habits will have an impact on the growth and development of the fetus, which may lead to fetal malformation. The fetus is very sensitive and fragile. If pregnant women live in a smog environment for a long time, it will also lead to shorter fetal head and thighs.