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Related Experiment Videos

Parturition-induced changes in maternal plasma cortisol levels.

U C Nwosu, E E Wallach, J D Feldman

    Obstetrics and Gynecology
    |September 1, 1975
    PubMed
    Summary
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    Maternal plasma cortisol levels are lower during spontaneous labor compared to elective induction or C-section. This suggests elective deliveries may be more stressful for mothers, with no apparent stress reflected in the fetus.

    Area of Science:

    • Endocrinology
    • Obstetrics
    • Perinatal Medicine

    Background:

    • Maternal plasma cortisol levels are crucial indicators of physiological stress during pregnancy and labor.
    • The role of maternal cortisol in initiating spontaneous labor and its response to elective delivery methods require further investigation.

    Purpose of the Study:

    • To compare maternal plasma cortisol levels during spontaneous labor, oxytocin-induced labor, and elective cesarean section.
    • To investigate the correlation between maternal and cord cortisol levels.
    • To assess the stress response of mothers undergoing different modes of term delivery.

    Main Methods:

    • Radioassay was used to measure total maternal plasma cortisol levels.
    • Measurements were taken at the onset of labor and full cervical dilatation in spontaneous labor.

    Related Experiment Videos

  • Cortisol levels were measured before and during uterine incision in elective cesarean sections and oxytocin-induced labor.

    • Main Results:

    • Initial maternal cortisol levels were significantly lower in spontaneous labor compared to oxytocin-induced labor (P < 0.01) and elective cesarean section (P < 0.05).
    • Spontaneous labor showed a significant cortisol rise at full cervical dilatation (P < 0.05), unlike elective groups.
    • No significant correlation was found between maternal and cord cortisol levels.

    Conclusions:

    • Elective pregnancy termination via oxytocin induction or cesarean section may induce greater maternal stress than spontaneous labor.
    • Maternal stress, as indicated by plasma cortisol, does not appear to be reflected in fetal cortisol levels.
    • Maternal cortisol surge is unlikely to be the primary driver of fetal plasma cortisol preceding spontaneous labor.