What legal substance accounts for 20-30 percent of pre-term babies and 10 percent of infant deaths?

Question

Quizplus · Accepted Answer

Tobacco use during pregnancy accounts for 20-30 percent of pre-term babies and 10 percent of infant deaths. Alcohol use during pregnancy can also lead to serious health issues for the baby, but it does not account for as large a percentage of pre-term births and infant deaths as tobacco use does. Cat feces can contain the parasite toxoplasma, which can be harmful to a developing fetus, but it is not a legal substance. Marijuana use during pregnancy can also have negative effects on the baby, but it does not account for as large a percentage of pre-term births and infant deaths as tobacco use does.

What Legal Substance Accounts for 20-30 Percent of Pre-Term Babies