If chickenpox occurs in a pregnant woman within 20 weeks of pregnancy, the probability that the fetus will be affected is about 2%, although the incidence is not high, if it occurs, what are the effects on the fetus? (1) 1 to 4 months of pregnancy: it can cause fetal malformation and abnormal development. (2) 4 to 5 months of pregnancy: can cause serious damage to fetal muscles, nerves, eyes, brain, lungs and skin. (3) 16 days before to 2 days after birth: 25% of newborns have severe chickenpox 5 to 10 days after birth, and if not treated, the mortality rate is up to 30%. How dangerous is chickenpox to pregnant women themselves? Pregnant women with chickenpox will be heavier than children and ordinary adults, and are more likely to develop chickenpox pneumonia, hepatitis, myocarditis, nephritis and thrombocytopenic purpura, which can be life-threatening in severe cases. How long does it take for chickenpox to develop after a pregnant woman is infected with the virus? Chickenpox is highly contagious and can be contracted through respiratory droplets or direct contact, and can develop 10 to 20 days after being infected. How to prevent chickenpox? Pregnant women should stay away from chickenpox patients to prevent being infected by the chickenpox virus. Avoid going to public places where there are many people. If you have not had chickenpox, you can get chickenpox vaccine before pregnancy if necessary, in two injections, 3 months apart. What should a pregnant woman do if she has chickenpox? Early antiviral treatment is the key, it is best to start treatment within 3 days of the onset of the rash, available acyclovir, generally used for 5 to 10 days. It can reduce the clinical symptoms, shorten the course of the disease and prevent the spread of the disease. It is usually cured in about 2 weeks.