Obese women more likely to have abortions, unplanned pregnancies

At least in France they are.

A study of French men and women found that obese women are 4 times more likely to experience unplanned pregnancies and have abortions.

Among women under age 30, researchers noted that obese respondents were four times as likely to report having had an unplanned pregnancy or abortion compared with normal BMI-range peers. They also found that, compared to normal range BMI women, obese women were less likely to have spoken with a doctor in the previous year about options for contraception, were less likely to use the birth control pill or condoms, and were significantly more likely — 8 times more likely, specifically — to report using less effective contraception methods (such as "pulling out").

I'm guessing it's likely that income levels could be an overlying factor.