Clinical trialNCT01941134WithdrawnPhase 4Interventional

Changes in Oral Contraceptive Hormones After Gastric Bypass Surgery

SponsorJohns Hopkins UniversityEnrollment0Bariatric Surgery CandidateContraception

View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This study will attempt to determine whether having gastric bypass surgery changes the way that the gut absorbs hormones from birth control pills. It is believed that, because gastric bypass surgery causes malabsorption of nutrients and some medications, the levels of birth control hormones after the surgery will be lower than in women before they have the surgery. The investigators will ask several women to take a pack of birth control pills before having bypass surgery, and then another pack several months after surgery. The investigators will measure hormone levels in the blood. The investigators will also measure outcomes that may tell us how well the birth control pills are working, such as ultrasounds of the uterus and ovaries, and examination of the cervix.

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Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

Anne Burke, MD MPH
Johns Hopkins University
Principal Investigator
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Kimberly Steele, MD
Johns Hopkins University
Principal Investigator
clinicaltrials.gov ↗
Roxanne M Jamshidi, MD MPH
Johns Hopkins University
Principal Investigator
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A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

1 registered facility, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States

Johns Hopkins Bayview Medical Center
Baltimore, Maryland, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

Ethinyl estradiol / levonorgestrel

Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start: 30 Apr 2013
Primary completion: 6 Dec 2017
Completion: 6 Dec 2017
Last update posted: 21 Mar 2018
Registered enrollment: 0
Registry id: NCT01941134

clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.