Skip to content

Birth Control to Improve Birth Spacing

Birth Control to Improve Birth Spacing: a Prospective Longitudinal Cohort Study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT05240066
Acronym
BIBS
Enrollment
1341
Registered
2022-02-15
Start date
2022-02-17
Completion date
2026-06-30
Last updated
2026-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Birth Spacing, Contraception, Contraception Behavior, Knowledge, Attitudes, Practice

Keywords

birth spacing, behavior, environmental barriers, pospartum, contraception

Brief summary

This study aims to investigate the drivers of postpartum contraceptive use with a prospective cohort. The study will clarify the role of contraceptive knowledge, attitudes, norms, and self-efficacy in driving intention to initiate contraception postpartum and describe the impact of environmental barriers on enacting intended postpartum contraception initiation.

Detailed description

This study will be a sequential mixed-methods design with a prospective cohort to identify and explore barriers to contraceptive initiation both immediately after birth and prior to hospital discharge, as well as throughout the fourth trimester. It will include a baseline patient survey, electronic medical record data pull, follow up survey, and qualitative interviews. The investigators will enroll 1400 patients into the prospective cohort, selecting individuals enrolled at prenatal care visits at two sites. The baseline survey will be self-administered. The investigators will then contact participants for a follow-up survey at 12 weeks postpartum. Surveys will be self-administered through a link received by text message or email. Additional analyses will draw on retrospectively collected medical record data. The investigators will invite a subset of 25-30 study subjects to participate in qualitative interviews.

Interventions

None listed

Sponsors

Boston Medical Center
CollaboratorOTHER
Harvard Medical School (HMS and HSDM)
CollaboratorOTHER
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
CollaboratorNIH
Brigham and Women's Hospital
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Age 18 or older * Pregnant * Attending prenatal care visits at one of the two study sites

Exclusion criteria

* Under the age of 18 * Cannot complete a survey in English or Spanish * Do not have physical or cognitive ability to complete a survey on a tablet

Design outcomes

Primary

MeasureTime frameDescription
Environmental barriers to contraceptive use12-week follow upParticipants will rate the difficulty in accessing their desired contraceptive method after giving birth and respond to the reasons why it is - or is not - easy to access.
Planned postpartum contraceptive methodBaselineself-report of selected method
Contraceptive use12-week follow upParticipants will be asked if they have used a contraceptive method since giving birth.
Desired birth spacingBaselineself-reported desire to space births
Contraceptive attitudes and normsBaselinemeasured via validated psychometric scales; Examining Contraceptive Use and Unmet Need Study, 12-58 range, higher score indicates more knowledge, citation: Callegari, Lisa S., MD, MPH, Zhao, Xinhua, PhD, Schwarz, Eleanor Bimla, MD, MS, Rosenfeld, Elian, PhD, Mor, Maria K., PhD, & Borrero, Sonya, MD, MS. (2017). Racial/ethnic differences in contraceptive preferences, beliefs, and self-efficacy among women veterans. American Journal of Obstetrics and Gynecology, 216(5), 504.e1-504.e10. DOI: 10.1016/j.ajog.2016.12.178
contraceptive self-efficacyBaselinemeasured via validated psychometric scales; Examining Contraceptive Use and Unmet Need Study, 12-58 range, higher score indicates more knowledge, citation: Callegari, Lisa S., MD, MPH, Zhao, Xinhua, PhD, Schwarz, Eleanor Bimla, MD, MS, Rosenfeld, Elian, PhD, Mor, Maria K., PhD, & Borrero, Sonya, MD, MS. (2017). Racial/ethnic differences in contraceptive preferences, beliefs, and self-efficacy among women veterans. American Journal of Obstetrics and Gynecology, 216(5), 504.e1-504.e10. DOI: 10.1016/j.ajog.2016.12.178
Contraceptive knowledgeBaselinemeasured via the Contraceptive Knowledge Assessment (Haynes et al 2017), 0-25 score range, higher scores reflect greater knowledge. Haynes MC, Ryan N, Saleh M, Winkel AF, Ades V. Contraceptive Knowledge Assessment: validity and reliability of a novel contraceptive research tool. Contraception. 2017 Feb;95(2):190-197. doi: 10.1016/j.contraception.2016.09.002. Epub 2016 Sep 9.
Intention to initiate contraception postpartumBaselineself-reported desire to use contraception within 12 weeks of birth

Secondary

MeasureTime frameDescription
Intimate partner violence12-week follow upmeasured via validated psychometric scales; Abuse Assessment Screen, 5 items, citation: Soeken, K. L., McFarlane, J., Parker, B., & Lominack, M. C. (1998). The Abuse Assessment Screen: A clinical instrument to measure frequency, severity, and perpetrator of abuse against women. In J. C. Campbell (Ed.), Sage series on violence against women. Empowering survivors of abuse: Health care for battered women and their children (pp. 195-203). Thousand Oaks, CA, US: Sage Publications, Inc.

Other

MeasureTime frameDescription
Immediate and delayed postpartum method uptake72 hours postpartum, 12 weeks postpartumcontraceptive method prescribed, inserted, injected, or otherwise provided

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026