Numerous studies have shown that smoking can have negative effects on fertility. In women, smoking decreases in vitro fertilization (IVF) and intrauterine insemination (IUI) pregnancy rates by about half. Smoking also increases miscarriage rates. In men, smoking decreases sperm function and impairs fertilization.
The effects of smoking stay in the body for several months, which is why the attitude of "I will stop when I get pregnant" may not work. The longer you have not smoked, the better your chances for pregnancy. Fertility doctors strongly recommend that both partners stop smoking at least two to three months before fertility treatments.
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