The 20th revised edition contains many updates including:United States Medical Eligibility Criteria (with descriptions of how some of the more complicated decisions were made)The very latest CDC Sexually Transmitted Diseases Treatment GuidelinesSexuality and Contraception - A superb new chapterMenstrual Disorders - this chapter alone is worth the cost of the bookThe EVER CHANGING new Screening Guidelines for Cervical and Breast Cancers.Assessment of Abnormal Early PregnancyUpdate on Guidelines for Contraception for Breastfeeding WomenUpdated failure rates of all contraceptives that will soon make their way in the package inserts for women receiving contraceptives in the United StatesLatest on risk for venous thromboembolism (VTE) for women using new pillsExpanded and updated section on medical abortion