Skin conductance activity in post-term pregnancies

Area of Science:

• Obstetrics and Gynecology
• Physiology
• Perinatal Medicine

Background:

• Maternal pain perception and stress response change during late pregnancy.
• Predicting spontaneous labor onset in post-term pregnancies remains a clinical challenge.

Purpose of the Study:

• To evaluate skin conductance activity as a predictor of spontaneous labor onset in post-term pregnancies.
• To assess the sympathetic nervous system response to stimuli in relation to labor timing.

Main Methods:

• Prospective observational study involving 52 healthy post-term pregnant women.
• Included cardiotocography, 5-minute skin conductance measurement with a cold pressor test, and cervical assessment.
• Compared responses between women with spontaneous versus induced labor onset.

Main Results:

• Women delivering spontaneously showed significantly lower pain reactions during provocation compared to induced deliveries (p = 0.02).
• 63% of women with spontaneous onset had a negative provocation value versus 30% in the induced group.

Conclusions:

• A decreased response to pain stimuli, indicating reduced sympathetic nervous system activity, correlates with spontaneous labor onset in post-term pregnancies.
• Skin conductance monitoring may serve as a useful predictor for spontaneous labor in post-term cases.