Smoking during the first trimester of pregnancy is clearly linked with an increased risk of cleft lip in newborns. Genes that play a role in detoxification of cigarette smoke do not appear to be involved, according to a new study.
Smoking during the first trimester of pregnancy is clearly linked with an increased risk of cleft lip in newborns. Genes that play a role in detoxification of cigarette smoke do not appear to be involved, according to a new study.