Subdermal contraceptive effective in all body weights

An analysis of data from a prospective cohort study of 9256 women aged 14–45 years in the US estimated contraceptive failure rates of the etonogestrel subdermal implant in overweight and obese women. This was compared to failure rates in women of normal weight and those using intrauterine devices (IUD).

The authors said there was little information about the effectiveness of the etonogestrel implant in relation to body weight, leading to confusion when counselling overweight and obese patients.

The analysis found the effectiveness of the implant was not influenced by Body Mass Index. Both the implant and IUD

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