Progestin-Only Pills (POPs) Guidelines

Introduction to POPs

The American Academy of Pediatrics recommends that progestin-only pills (POPs) work primarily by thickening cervical mucus rather than inhibiting ovulation, and are available in several formulations with different progestin types and dosages 1, 2

The Centers for Disease Control and Prevention (CDC) states that traditional POPs contain lower doses of progestins and require strict adherence to timing (must be taken within 3 hours of the same time each day) 3

The American Academy of Pediatrics notes that POPs do not consistently inhibit ovulation, which contributes to their lower effectiveness compared to combined methods 1, 2
With typical use, approximately 9 out of 100 women become pregnant in the first year of using POPs 4

The CDC recommends that if a dose is missed, users should take one pill as soon as possible, continue taking pills daily at the same time, use backup contraception for 2 consecutive days of correct pill use, and consider emergency contraception if unprotected intercourse occurred 3
The American Academy of Pediatrics states that POPs are generally not recommended as first-choice contraceptives for healthy adolescents due to the strict timing requirements and potential for irregular bleeding 1, 2

The CDC suggests that management of bleeding irregularities may include NSAIDs for 5-7 days of treatment 5
Praxis Medical Insights recommends counseling about expected bleeding patterns 4

The CDC states that breastfeeding women are appropriate candidates for POPs, as they do not affect milk production 5
The American Academy of Pediatrics recommends that women with contraindications to estrogen use, such as history of venous thromboembolism or hypertension, are appropriate candidates for POPs 2

The CDC recommends that no routine follow-up visit is required after initiating POPs, but women should be advised to return if they experience side effects or want to change methods 3, 6

The American Academy of Pediatrics notes that irregular bleeding patterns are the most frequently reported side effect, occurring because POPs work primarily by thickening cervical mucus rather than consistently inhibiting ovulation 7
The American Academy of Pediatrics recommends that POPs are not typically recommended as first-choice contraceptives in healthy adolescents due to lower effectiveness and strict timing requirements 7

The Arthritis Care & Research journal reports that POPs do not increase venous thromboembolism (VTE) risk in healthy women (RR 0.90, 95% CI 0.57-1.45) 8
The Arthritis and Rheumatology journal also states that POPs do not increase venous thromboembolism (VTE) risk in healthy women, making them appropriate for women with contraindications to estrogen, including those with positive antiphospholipid antibodies or history of thrombosis 9