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Birthing postures and birth canal lacerations.
1a Department of Obstetrics and Gynecology , Japanese Red Cross Katsushika Maternity Hospital , Tokyo , Japan.
Summary
Lateral birthing positions may reduce birth canal lacerations compared to supine positions. However, the "fours" posture is linked to a higher risk of severe perineal tears in childbirth.
Area of Science:
- Obstetrics and Gynecology
- Perinatal Care
- Maternal Health
Background:
- Childbirth practices vary globally, influencing maternal and infant outcomes.
- Understanding the impact of different delivery postures on birth canal trauma is crucial for informed decision-making.
Purpose of the Study:
- To compare the incidence and severity of birth canal lacerations across supine, lateral, and quadrupedal (fours) delivery positions.
- To provide evidence supporting pregnant individuals in choosing optimal birthing postures.
Main Methods:
- Retrospective analysis of "low risk" pregnant women (n=6300+) undergoing midwife-led care.
- Data collected between April 2006 and March 2015 at a Japanese maternity hospital.
- Categorization of birth canal lacerations based on delivery posture: supine, lateral, and quadrupedal.
Main Results:
- Lateral posture delivery showed a significantly lower rate of no laceration (OR 0.63) and overall perineal laceration (OR 0.86) compared to supine.
- Quadrupedal (fours) posture delivery was associated with a significantly higher incidence of third- or fourth-degree perineal lacerations (OR 2.28) versus supine.
- Statistical significance was established with p < 0.01 for key findings.
Conclusions:
- Lateral birthing positions appear to offer a protective effect against birth canal lacerations compared to the traditional supine position.
- The quadrupedal (fours) position is linked to an increased risk of severe perineal trauma, warranting caution.
- Findings can empower expectant mothers to make informed choices regarding their delivery posture.