I need three subtopics for my topic (should birth control pills be available to teenage girls without a prescription?

Subtopic one: pros here you could talk about how pills are beneficial to avoiding pregnancy

subtopic two: cons here you could talk about the possibility of misuse or of forgetting to take it when necessary

subtopic three: conclusion you should decide whether you support birth control pills without a subscription or not

No! Because a teenage girl could take abuse of the pill and keep on using it to sell for drugs, to take it and become addicted.

sorry it is only 1 but it should give you an idea on what to add for your other 2.