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Quick start after LNG EC — DFSRH MCQ

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HardProgestogen-only contraceptionQuick start after LNG ECDFSRH

A patient takes levonorgestrel emergency contraception after condom failure and wants to start a desogestrel POP the same day. What should she do?

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Correct answer: E — Start the desogestrel POP now and use condoms for 2 days

The best answer is “Start the desogestrel POP now and use condoms for 2 days”. Progestogen contraception can be started immediately after levonorgestrel emergency contraception. A desogestrel POP requires 2 days of additional precautions after quick start. The 5-day delay applies after ulipristal, whose ovulation-delaying effect may be reduced by progestogen. She should also perform a pregnancy test 21 days after the relevant unprotected intercourse.

Reference: CoSRH/FSRH, Progestogen-only Pills (August 2022, amended April 2026): https://www.cosrh.org/Common/Uploaded%20files/documents/fsrh-ceu-clinical-guideline-progestogen-only-pills-aug22-amended-11july-2023-.pdf