Substance abuse can contribute to teenage pregnancy in various ways. The use of drugs and alcohol can impair judgment, leading to risky sexual behavior and unprotected sex, which increases the likelihood of unintended pregnancy. Substance abuse can also lead to a lack of contraception use and inconsistent use, as well as a lack of understanding of the risks associated with unprotected sex. Additionally, substance abuse can lead to difficulties in forming and maintaining healthy relationships, which can contribute to a higher likelihood of engaging in risky sexual behavior. Overall, substance abuse can increase the likelihood of teenage pregnancy, which can have significant negative consequences for both the parent and the child.