The survey of 55 women found that weight-gain was the main deterrent in choosing hormonal contraception. The women did not want to opt for coil and implants because they were uncomfortable with invasive procedures.
Most women also chose the Pill simply because their colleagues or friends were using it. The term long acting seemed to scare many women who were worried about fertility problems in future.
"We are shooting ourselves in the foot by saying they are long-acting, and we need to emphasise that they don't impair fertility, and the majority of them don't affect weight," said Professor Anna Glasier, from Sexual Health NHS Lothian.
The details of the study are published in the Journal of Family Planning and Reproductive Health Care.