Long-term secondhand smoke in women will first increase the incidence of various diseases, and in serious cases even cause cancer, especially in the respiratory system. Second, long-term exposure to secondhand smoke can cause genetic mutations, which can lead to infertility in women of childbearing age, and can lead to miscarriage or premature birth after pregnancy. In addition, if a pregnant woman inhales too much secondhand smoke during pregnancy, even if a normal fetus survives, the rate of respiratory diseases, blood system diseases such as leukemia, and neurological diseases in the next generation is significantly higher than that of women who do not inhale secondhand smoke.