Related Experiment Video
Updated: May 31, 2026
08:49
External Cephalic Version: Is it an Effective and Safe Procedure?
Published on: June 6, 2020
Interbirth interval with frequency of cesarean delivery
Emily S Miller1, William A Grobman
1From the Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Illinois.
Obstetrics and Gynecology
|June 22, 2011
Summary
A longer time between births increases the risk of cesarean delivery. Women with interbirth intervals of 15 or more years had a significantly higher cesarean delivery rate compared to those with intervals less than 5 years.
Area of Science:
- Obstetrics and Gynecology
- Reproductive Health
- Maternal-Fetal Medicine
Background:
- The interval between pregnancies, known as the interbirth interval (IBI), is a key factor in reproductive health.
- Understanding the relationship between IBI and delivery mode is crucial for optimizing maternal and infant outcomes.
Purpose of the Study:
- To investigate the association between interbirth interval and the likelihood of undergoing a cesarean delivery.
- To quantify the risk of cesarean delivery based on varying lengths of time between consecutive births.
Main Methods:
- A retrospective cohort study involving 2,528 multiparous women at a tertiary care hospital.
- Women were categorized into groups based on interdelivery intervals in 5-year increments.
- Logistic regression analysis was employed to control for confounding factors and estimate the independent association.
Main Results:
- Cesarean delivery rates increased progressively with longer interbirth intervals.
- Rates were 1.9% ( <5 years), 5.0% (5-9 years), 7.7% (10-14 years), and 13.3% (≥15 years).
- Adjusted odds ratios for cesarean delivery significantly increased with longer IBIs, reaching 7.2 for intervals of 15+ years.
Conclusions:
- A longer interbirth interval is independently linked to a higher risk of cesarean delivery.
- This finding highlights the importance of considering IBI in risk assessment for delivery mode.
- Further research may explore underlying mechanisms and clinical implications.
Related Concept Videos
01:28Development of the Oral Microbiota
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
01:24In Vitro Fertilization
In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
01:21Intrauterine Drug Delivery Systems
Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...
01:30Development of Human Microbiota
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
01:19Dosage Interval and Administration Route: Determination Methods
A medication’s effectiveness largely depends on its appropriate dosage and the route of administration. Dosage ensures that a sufficient drug concentration is maintained in the bloodstream to elicit the desired therapeutic effect without causing toxicity. The route of administration affects the drug's bioavailability, rate of absorption, and onset of action, which are crucial for achieving optimal therapeutic outcomes. Drug dosage calculations are critical to tailoring therapy to individual...
01:19Interpretation of Confidence Intervals
A confidence interval is a better estimate of the population than a point estimate, as it uses a range of values from a sample instead of a single value.
Confidence intervals have confidence coefficients that are crucial for their interpretation. The most common confidence coefficients are 0.90, 0.95, and 0.99, which can be written as percentages–90%, 95%, and 99%, respectively.
Suppose a person calculates a confidence interval with a confidence coefficient of 0.95. In that case, they can...
Confidence intervals have confidence coefficients that are crucial for their interpretation. The most common confidence coefficients are 0.90, 0.95, and 0.99, which can be written as percentages–90%, 95%, and 99%, respectively.
Suppose a person calculates a confidence interval with a confidence coefficient of 0.95. In that case, they can...