Publications by authors named "Mitchell Creinin"

Objectives: This study aimed to assess 3-year efficacy, safety, and tolerability of the Cu 175 mm intrauterine device (IUD).

Study Design: This single-arm trial recruited participants at risk of pregnancy aged 17 to 45 years at 42 U.S.

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Objectives: To evaluate feasibility of levonorgestrel 52 mg intrauterine device (IUD) placement without uterine sounding.

Study Design: We performed a three-phase feasibility study from February 2023-May 2024. In phase one, participants had levonorgestrel 52 mg IUD placement with sounding.

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Article Synopsis
  • The study aimed to assess the experiences of obstetrics and gynecology residents in California and Florida regarding contraception counseling training and practices.
  • Conducted between September 2022 and February 2023, it involved surveys and interviews with residents to evaluate their counseling methods, feelings of pressure, and experiences with coercion in contraceptive choices.
  • Findings revealed that while most residents regularly used tiered-effectiveness counseling, many felt they didn't receive adequate formal training, often learning through observation, and expressed disappointment over patients opting to remove long-acting reversible contraception (LARC).
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The relative risk of pregnancy with the levonorgestrel 52 mg IUD is 3 times lower than with optimal combined oral contraceptive use.

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Background: Although the levonorgestrel 52 mg intrauterine device is locally active and has low systemic hormone exposure, hormonal intrauterine device users sometimes report hormone-related side effects.

Objective: Evaluate hormone-related adverse event rates among all participants and compare these among those who used combined hormonal or no hormonal contraception in the month before enrollment.

Study Design: A total of 1714 women aged 16 to 45 years old received a levonorgestrel 52 mg intrauterine device in a multicenter phase 3 trial to evaluate contraceptive efficacy and safety for up to 10 years.

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Purpose: To describe the effects of estetrol (E4) 15 mgdrospirenone (DRSP) 3 mg on physical and emotional premenstrual and menstrual symptoms.

Materials And Methods: We used Menstrual Distress Questionnaire (MDQ) data from a phase-3 trial (NCT02817828) in Europe and Russia with participants (18 - 50 years) using E4/DRSP for up to 13 cycles. We assessed mean changes in MDQ--scores from baseline to end of treatment in premenstrual (4 days before most recent flow) and menstrual (most recent flow) scores for 4 MDQ domains in starters and switchers (use of hormonal contraception in prior 3 months) and performed a shift analysis on individual symptoms within each domain.

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Objective: To evaluate menstrual cup use and intrauterine device (IUD) expulsion.

Study Design: We performed a secondary analysis of a 3-year contraceptive efficacy trial comparing two copper 380 mm IUDs. Investigators randomized participants approximately 1:4 to the TCu380A or NTCu380-Mini IUD.

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Objective: To evaluate differences based on intrauterine device (IUD) frame geometry in force, and stress, and strain at the stem/arms junction during simulated IUD removal.

Study Design: We manufactured injection-molded frame models for three Nova-T IUDs (Mirena [model M]; Liletta [model L]; Kyleena [model K]) and a Tatum-T IUD (Paragard [model P]) at two-times scaling. We created a custom fixture to simulate the uterus and used a screw-driven machine to pull models at various displacement rates through the 10 cm fixture cavity to measure force and strain and calculate stress at the IUD stem/arms junction.

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Ethinylestradiol and drospirenone combined oral contraceptive formulations have been marketed for >20 years. Drospirenone has antimineralocorticoid and anti-androgenic effects that may offer several health benefits. Recently, 2 new drospirenone-containing oral contraceptives entered the market, 1 as a progestin-only pill containing 4 mg drospirenone and the other as a combined oral contraceptive containing 15 mg estetrol and 3 mg drospirenone.

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Objectives: This study aimed to compare contraceptive efficacy and safety of drospirenone 4 mg in a 24/4-day regimen in nonobese and obese users and describe pharmacokinetics according to bodyweight.

Study Design: We analyzed data from three drospirenone 4 mg trials (2 European and 1 United States) to report outcomes in nonobese (body mass index <30 kg/m) and obese (body mass index ≥30 kg/m) users. We used data from the US trial to calculate the Pearl Index (pregnancies per 100 woman-years) in nonbreastfeeding participants aged ≤35 years at enrollment for confirmed pregnancies.

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Objectives: This study aimed to review clinical practice outcomes of early pregnancy loss (EPL) medical management using mifepristone and misoprostol outside of a clinical trial setting.

Study Design: In this retrospective cohort study, we reviewed a deidentified database of patients who received mifepristone-misoprostol for EPL from May 2018 to May 2021 at our academic center-based clinic, which was a study site for a multicenter mifepristone-misoprostol EPL trial completed in March 2018. All patients received mifepristone 200 mg orally and misoprostol 800 mcg vaginally or buccally, with clinic follow-up typically scheduled within 1 week.

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Objective: To assess the relationship of adherence and pregnancy in participants using an estetrol and drospirenone combined oral contraceptive.

Methods: We performed a secondary analysis for which we pooled data from two parallel, multicenter, phase 3 trials (United States and Canada, Europe and Russia) that enrolled participants 16-50 years of age to receive estetrol 15 mg and drospirenone 3 mg in a 24 hormone and four placebo pills regimen for up to 13 cycles. Participants reported pill intake, sexual intercourse, and other contraceptive use on paper diaries.

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Objective: To evaluate heavy menstrual bleeding treatment outcomes with levonorgestrel 52-mg intrauterine device (IUD) use in participants without body mass index (BMI) or parity restrictions.

Methods: Investigators included participants aged 18-50 years with no pelvic or systemic pathology causing heavy menstrual bleeding at 29 U.S.

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Funding Source: Medicines360. The Sponsor, Medicines360, designed the study and oversaw its conduct, including funding the trial and providing all study product free of charge to participants.

Clinical Trial Registration: ClinicalTrials.

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Objectives: To describe treatment and outcomes of patients with confirmed cesarean scar ectopic pregnancy (CSEP) at a tertiary referral center.

Study Design: We reviewed a deidentified family planning clinical database for patients seen by our subspecialty service for CSEP from January 2017 through December 2021 in this case series. We extracted referral information, final diagnosis, management, and outcome measures including estimated blood loss, secondary procedures, and treatment complications.

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Objectives: To describe practice patterns and challenges encountered by Complex Family Planning (CFP) fellowship graduates.

Study Design: We invited all 110 obstetrics and gynecology physicians who graduated from the CFP fellowship from 2017-2020 via email to complete an anonymous online survey. We inquired about demographics, intended and obtained postfellowship positions, and successes and challenges in obtaining jobs.

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