Behavioral and Environmetal Factors and Time to Delivery
Public ClinicalTrials.gov record NCT00740506. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Behavioral and Environmental Factors and Time to Delivery
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study, conducted at the Naval Medical Center in San Diego, CA, will determine if having vaginal intercourse in the last weeks of pregnancy decreases the risk of having a prolonged pregnancy. Pregnancies that continue beyond the due date may increase health risks for the mother and the baby. Although some believe that vaginal intercourse can help start labor in the last weeks of pregnancy, there is not proof that it works. Some studies showed that sexual intercourse helped and some that pregnancy lasted even longer for couples having sex. In addition to exploring the effect of sexual intercourse on time to delivery, this study will collect information that can be used in the future to predict when labor will naturally start and the risk for overdue pregnancies. Women 18 years of age and older in their first pregnancy who are carrying a single fetus with gestational age before 38 plus 6 weeks may be eligible for this study. Candidates must be living with their partner in a stable relationship. Participants are asked to have sexual intercourse about three times per week. They complete a diary in which they record the times they have intercourse and how they are feeling daily. The diaries are submitted by mail each week or at the doctor's or midwife's visit until delivery. The women have a pelvic exam and ultrasound and complete questionnaires about problems during pregnancy, overall well-being, attitude toward induction of labor, physical activity, body image during pregnancy, stress and social support, habits at home, and environmental conditions, such as weather.
Study identification
- NCT ID
- NCT00740506
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 4
- Lead sponsor
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- NIH
- Enrollment
- 510 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- Not listed
- Sex
- Female
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 19, 2008
- Primary completion
- Jul 12, 2009
- Completion
- Jul 12, 2009
- Last update posted
- Jul 1, 2017
2008 – 2009
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Naval Medical Center, San Diego | San Diego | California | 92134-5000 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00740506, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 1, 2017 · Synced Sep 11, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00740506 live on ClinicalTrials.gov.