Analysis of micro-level data reveals that changes in the minimum legal drinking age (MLDA)could induce changes in the intensity and location of alcohol consumption, sexual behavior, and teen fertility. Effects on teen fertility vary across different populations. Among 15-20 year-old non-poor whites, less restrictive legal access to alcohol decreases the probability of first pregnancy and abortion. For this group, easier legal access to alcohol likely increases the alcohol consumption in bars. For black and poor white young women, the results are sensitive to the alcohol consumption restrictions measure. A decrease in the MLDA increases the probability of first pregnancy and abortion. Yet, using a more precise measure that accounts for the MLDA and the woman’s age, these results generally no longer hold.