FSRH Clinical Guideline: Progestogen-only Injectable (December 2014, Amended July 2023)
... 15 10 Are there Any Factors that Would Affect the Efficacy of Progestogen-only Injectables? 16 10.1 Drug interactions 16 10.2 Weight 16 11 Other Considerations 17 11.1 Return of fertility 17 11.2 Emergency ...