Progestogen-only contraception commonly causes breakthrough bleeding

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Clinical literature consistently demonstrates that progestogen-only contraceptives frequently cause irregular, unscheduled, or breakthrough vaginal bleeding, which is a primary reason for discontinuation.

The analysis

The retrieved papers include studies and reviews that explicitly discuss irregular, unscheduled, or unfavorable vaginal bleeding (breakthrough bleeding) as a well-known side effect of progestogen-only contraceptives and implants. There are no refuting papers.

Evidence for · 3

Medical Treatment for Endometriosis: One Size Does Not Fit All.

Recorded source metadata

Vercellini P, Salmeri N, Bandini V, Conca B, Viganò P, Somigliana E, Vignali M. Medical Treatment for Endometriosis: One Size Does Not Fit All.. 2026. https://doi.org/10.3390/jcm15062408

Notes that the main adverse effect of progestogens used in clinical treatment is irregular bleeding.

Source citation format

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More for · 2

Gene expression associated with unfavorable vaginal bleeding in women using the etonogestrel subdermal contraceptive implant: a prospective study.

Recorded source metadata

Torelli FR, Rodrigues-Peres RM, Monteiro I, Lopes-Cendes I, Bahamondes L, Juliato CRT. Gene expression associated with unfavorable vaginal bleeding in women using the etonogestrel subdermal contraceptive implant: a prospective study.. 2024. https://doi.org/10.1038/s41598-024-61751-7

Investigates unfavorable vaginal bleeding and breakthrough bleeding associated with progestogen-only contraceptive implants.

Source citation format

Treatments of unscheduled vaginal bleeding due to progestin-only contraception.

Recorded source metadata

Steinfeldt M, Lora Matos AD, Cu C, Heinrich C, Hartman C, Gibson E, Becerra Mateus JC, Al Abosy J, Abedi P, Jahanfar S. Treatments of unscheduled vaginal bleeding due to progestin-only contraception.. 2024. https://doi.org/10.1002/14651858.cd015441

Discusses treatments for unscheduled vaginal bleeding specifically resulting from progestin-only contraception usage.

Source citation format

The paper trail · every fact has a biography

first checked02 Aug 2026

judged → SUPPORTED · 7702 Aug 2026

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