Hyperandrogenic syndrome is a disorder caused by variations in the number, morphology, structure and binding of chromosomes at the time of pregnancy due to harmful chemicals, X-ray exposure, the effects of environmental factors, advanced pregnancy, and consanguineous marriages. The prevention of chromosomal abnormalities causing Fernando syndrome starts with the details of life, cultivating good social habits, nutrition, and environmental toxins, all of which may reduce the risk of adverse outcomes. Once a child with chromosomal abnormalities is born, treatment is very difficult, thus prevention of chromosomal abnormalities, during pregnancy to strengthen the diet regimen. 1, should not be high sugar diet Pregnant women in the high blood sugar group are three times more likely to give birth to chromosomal abnormalities, overweight fetuses, the incidence of fetal congenital malformations, the chance of pregnancy toxemia or the number of C-section deliveries, respectively, than those in the low blood sugar group, seven times more likely and two times more likely. On the other hand, high blood sugar will increase the burden on the kidneys of pregnant women, which is not conducive to health care during pregnancy. 2, should not be high protein diet high protein diet during pregnancy, will affect the appetite of pregnant women, increase the burden on the gastrointestinal tract, the body can produce a large number of hydrogen sulfide, histamine and other harmful substances, easy to cause bloating, loss of appetite, dizziness, fatigue and other phenomena. 3, should not be high-fat diet If pregnant women have a long-term high-fat diet, it is bound to increase the risk of reproductive system cancer in their daughters. Long-term high-fat food will increase the concentration of bile acids and neutral cholesterol in the colon, while high-fat food can increase the synthesis of prolactin, prompting the occurrence of breast cancer, which is not conducive to the health of mother and child. 4, should not be high calcium diet Pregnant women who blindly carry out a high calcium diet, drinking a lot of milk, plus taking calcium tablets, vitamin D, etc., will be harmful to the fetus. Nutritionists believe that pregnant women with too much calcium, the fetus may get hypercalcemia, after birth, the affected child will be too early closure of fontanelle, jawbone widening and protruding, etc., is not conducive to healthy growth and development. 5, should not eat moldy food If pregnant women eat agricultural products and food contaminated by mycotoxins, not only will acute or chronic food poisoning, and can even affect the fetus. Because the 2-3 months of early pregnancy, is the embryo bed development, embryonic cells are at a high level of proliferation, differentiation stage, mycotoxin attack can make chromosome breakage or aberration, resulting in genetic diseases or fetal malformations, such as congenital heart disease, congenital stupidity, etc., and some even make the fetus stop developing and stillbirth, miscarriage.