The influence of the environment on the development of embryos?

Before planning a pregnancy, a woman should become familiar with the factors that affect the development of the embryo. Especially in the third trimester of pregnancy, there is a high risk of poisoning the fetus with contaminated air. It has been proven that the toxins transmitted from the mother to the fetus through the umbilical cord can shorten the telomeres of the unborn baby. The further health of the newborn depends on the length of the telomeres. It is very important to give up such bad habits as alcohol, smoking, drugs and toxic substances.