1. United Nations, Department of Economic and Social Affairs, Population Division (2019). Contraceptive Use by Methods 2019: Data Booklet (ST/ESA/SER.A/435).
2. Faculty of Sexual & Reproductive Healthcare. UK Medical Eligibility Criteria for Contraceptive Use (UKMEC) 2016 (April 2016, amended September 2019). 2016. https://www.fsrh.org/ukmec/
3. Faculty of Sexual & Reproductive Healthcare. FSRH Service Standards for Resuscitation in Sexual and Reproductive Health Services (December 2022). 2022. https://www.fsrh.org/standards-and-guidance/documents/fsrh-service-standards-for-resuscitation/
4. Faculty of Sexual & Reproductive Healthcare. FSRH Clinical Guideline: Emergency Contraception (March 2017, amended December 2020). 2017. https://www.fsrh.org/standards-and-guidance/documents/ceu-clinical-guidance-emergency-contraception-march-2017/
5. Faculty of Sexual & Reproductive Healthcare. FSRH New Product Review: Intrauterine Ball (IUBTM) SCu300B MIDI (February 2019). 2019. https://www.fsrh.org/standards-and-guidance/documents/new-product-review-intrauterine-ball-iub-scu300b-midi-february/