Smoking significantly increases infertility rates, negatively affecting fertility in both men and women. Additionally, it can decrease blood oxygen and energy levels due to its adverse health effects. Therefore, avoiding smoking is vital for maintaining reproductive health. ;
Smoking significantly increases infertility rates, affecting both men and women. It also lowers blood oxygen and energy levels, leading to various health complications. Therefore, the best answer to the question is option A: infertility rates.
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