Uterine activity in spontaneous labour with breech presentation.

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Clinical Obstetrics

Background:

• Breech presentation during labor presents unique challenges.
• Understanding uterine activity in different fetal presentations is crucial for optimizing delivery outcomes.
• Parity significantly influences labor dynamics and uterine activity.

Purpose of the Study:

• To quantify and compare uterine activity in patients with spontaneous labor and vaginal delivery of a breech presentation versus vertex presentation.
• To analyze the impact of parity on uterine activity in breech presentations.
• To assess neonatal outcomes (Apgar scores, cord blood pH) in relation to fetal presentation.

Main Methods:

• Quantification of uterine activity during labor.
• Comparison of uterine activity between breech and vertex presentations, stratified by parity (nulliparous vs. multiparous).
• Analysis of Apgar scores and umbilical cord arterial blood pH for neonates.

Main Results:

• Overall, multiparous patients with breech presentation exhibited lower uterine activity than nulliparous patients when considering the entire labor.
• Median uterine activity in breech presentations was not significantly different from control groups with vertex presentation, after controlling for parity.
• Neonatal outcomes, including Apgar scores and cord arterial blood pH, were significantly lower in breech deliveries compared to vertex presentations, despite adequate values.

Conclusions:

• Uterine activity during spontaneous labor is comparable between breech and vertex presentations when parity is accounted for.
• While uterine activity is similar, breech presentations are associated with poorer neonatal outcomes compared to vertex presentations.
• Parity is an important factor influencing uterine activity and should be considered in the analysis of labor patterns.