Question

why might a teenage girl who is using birth control be more at risk for becoming pregnant than a woman in her thirties?

Explanation:

Teenage girls may be less consistent with birth - control use due to forgetfulness, lack of understanding, or social pressures. Also, their bodies may respond differently to hormonal birth - control methods.

Answer:

Teenage girls may be less consistent with birth - control use and their bodies may respond differently to birth - control methods.