Dropping the drinking age to 18 may affect more than just road safety. It can cause recklessness in bed.
Lowering the drinking age would lead to more low-birth weight babies and unwanted pregnancies, says researchers at the University of Georgia.

They found that a drinking age of 18 would lead to an almost 5% increase in the number of births to 18-20 year olds. The likelihood of women under 21 having a low-birth weight baby increases by 6% with the lower drinking age. Premature birth rates are also increased by 5-7% in teenagers under age 18 when the drinking age is lowered.
Researchers …read more

According to a Canadian study published in the August edition of the Journal of Epidemiology and Community Health, women living closest to expressways , especially those in affluent areas, are more vulnerable to highway pollution and have a much higher risk of delivering a low-birth -weight baby than women who live further away from highways.
The study looked at 100,000 new births in the province of Quebec, which were recorded over a five-year span. Looking at Canada’s second biggest city, Montreal where
highways cut through affluent and poor neighborhoods alike, the scientists were able to make the socioeconomic comparisons between babies …read more