PT - JOURNAL ARTICLE ED - , TI - FSRH Guideline (January 2019, amended October 2023) Combined Hormonal Contraception AID - 10.1136/bmjsrh-2018-CHC DP - 2019 Jan 01 TA - BMJ Sexual & Reproductive Health PG - 1--93 VI - 45 IP - Suppl 1 4099 - http://jfprhc.bmj.com/content/45/Suppl_1/1.short 4100 - http://jfprhc.bmj.com/content/45/Suppl_1/1.full SO - BMJ Sex Reprod Health2019 Jan 01; 45