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NCT Number: NCT07081321

The Effect of Different Delivery Positions on Pelvic Floor Function.

This study is a prospective, multicenter, randomized controlled trial. Baseline data will be collected from eligible subjects recruited during the third trimester of pregnancy. Participants will be randomized into three groups when cervical dilation reaches 2 cm based on delivery position: lithotomy position, upright position, and lateral position. During the second stage of labor, data regarding delivery positions, duration of each position, and other obstetric conditions will be recorded. Pelvic floor function assessments will be performed in the postpartum period to evaluate the outcomes.

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Key information

Conditions

Stress Urinary Incontinence (SUI) Female Urogenital Diseases Female Urogenital Diseases and Pregnancy Complications Lower Urinary Tract Symptoms Male Urogenital Diseases Pathological Conditions, Signs and Symptoms Signs and Symptoms Urinary Incontinence Urinary Incontinence, Stress Urination Disorders Urogenital Diseases Urologic Diseases Urological Manifestations

Age range

20 year–40 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Peking University People's Hospital

Beijing, Beijing Municipality, 100032, China

Location contact

Lei Gao, MD

CONTACT

[email protected]

17669675336

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Aged 20 to 40 years.
  • Singleton, cephalic presentation, full-term primipara.
  • Absence of cephalopelvic disproportion.
  • Estimated fetal weight (EFW) < 4000 g.
  • Intended vaginal delivery and scheduled for postpartum follow-up at our hospital.
  • Voluntary participation with provision of informed consent.

Exclusion criteria

  • Moderate or severe stress urinary incontinence prior to pregnancy.
  • Pelvic Organ Prolapse Quantification (POP-Q) stage ≥ III, or a history of treatment for pelvic floor dysfunction.
  • Uncontrolled systemic medical diseases, or a history of asthma, allergic rhinitis, and constipation prior to pregnancy.
  • Presence of contraindications to vaginal delivery.
  • Presence of contraindications to the Valsalva maneuver (e.g., severe cardiopulmonary diseases, cervical incompetence, etc.).

Withdrawal Criteria:

  • The patient's clinical condition becomes unsuitable for continued study participation and follow-up.
  • The subject requests to withdraw from the study.

Treatment and study plan

Lithotomy position

Behavioral

Participants in the lithotomy decubitus position group were in the lithotomy position at the second stage of labor of delivery.

Lateral Position

Behavioral

Participants in the lateral position group were in the lateral position at the second stage of labor of delivery.

Upright Position

Behavioral

Participants in the upright position group were in the upright position at the second stage of labor of delivery.

Primary outcomes

  1. Stress urinary incontence (SUI) occurrence at 6 weeks postpartum

    Time frame: at 6 (±2) weeks postpartum

Study contacts

Contact information is provided by the study sponsor or research team.

Lei Gao, MD

CONTACT

[email protected]

+8617669675336

Sponsors and collaborators

Lead sponsor

Peking University People's Hospital

Other

Collaborators

  • Hangzhou maternity and child health care hospital
  • Jincheng People's Hospital
  • Luohe Central Hospital
  • The Third Xiangya Hospital of Central South University
  • Tongzhou Maternal and Child Healthcare Hospital of Beijing
  • Zhengzhou Central Hospital

Registry information

Official study title

Interventions for Geriatric Urinary Incontinence: The Effect of Intrapartum Interventions on Pelvic Floor Function

Important dates

Study start
2026
Primary completion
2027
Study completion
2028
First posted
Jul 23, 2025
Registry last updated
Sep 10, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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