What lifestyle habit can increase the risk of miscarriage?

Smoking is known to significantly increase the risk of miscarriage due to its impact on the developing fetus and the overall health of the pregnancy. Cigarette smoke contains harmful substances such as nicotine and carbon monoxide, which can reduce blood flow to the placenta and exacerbate existing conditions that may threaten a pregnancy. Additionally, smoking can lead to complications such as placental abruption, where the placenta detaches from the uterus prematurely, and can also increase the chances of developmental issues in the fetus.

While excessive exercise and high caffeine intake have been associated with increased risks, their impacts are generally not as clear-cut or as directly linked to miscarriage as smoking. In moderation, many women can safely engage in physical activity and consume caffeine without adversely affecting their pregnancy. The consumption of dairy products generally poses no risk in terms of miscarriage, as they are a vital source of nutrients for both the mother and the developing baby, unless there are specific allergies or intolerances involved.