Comparison of contraceptive implant adopters and pill users in a family planning clinic in Baltimore.

All 133 women who began using the Norplant contraceptive implant between August and December of 1991 at a Planned Parenthood clinic in Baltimore were compared with a sample of 112 women who obtained prescriptions for the pill at the same clinic during the same time period. A multivariate analysis found that women of Medicaid are significantly more likely than those who are self-paying to select the implant rather than the pill. Similarly, compared with women who have had no children, those who have had two or more are also significantly more likely to choose the implant. However, adolescents and women who have had an abortion are no more likely than other women to select the implant.