Do birth control patches deliver their full dose? a study checks the leftovers
NCT ID NCT07739589
First seen Jul 31, 2026 · Last updated Jul 31, 2026
Summary
This study looks at how much of the hormones levonorgestrel and ethinyl estradiol remain in used TWIRLA birth control patches after a week of wear. Healthy women aged 18 to 40 will wear a single patch for 7 days, and researchers will measure the leftover hormone amounts on the patch, its packaging, and the skin. The goal is to confirm that the patch delivers a consistent dose of hormones as intended.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- TWIRLA (levonorgestrel and ethinyl estradiol) transdermal system
- What this could lead to
- If successful, this could confirm that the patch delivers a consistent dose of hormones, supporting its safe and effective use as a birth control method.
- What could go wrong
- This is a small, post-marketing study focused on measuring leftover hormone amounts, not on how well the patch prevents pregnancy. Results may not reflect real-world usage or individual variation.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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TKL Research Inc.
Fair Lawn, New Jersey, 07410, United States