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A comparative study of uterine activity in labour induced with prostaglandin F2alpha or oxytocin and in spontaneous labour. I. Pattern of the uterine contractions



A comparative study of uterine activity in labour induced with prostaglandin F2alpha or oxytocin and in spontaneous labour. I. Pattern of the uterine contractions



Acta Obstetricia et Gynecologica Scandinavica 55(5): 453-460



The uterine contraction patterns and the changes in fetal heart rate (FHR) were studied in cardiotocographic recordings from 26 women in oxytocin-induced labour, 26 women in PGF2alpha-induced labour and 24 women during the later part of spontaneous labour. The contraction patterns and their effect on the FHR did not differ between the three groups. During the course of labour an increasing steepness of the upward slope of the contraction wave with increasing intensity of the contraction was found. High frequency of atypical contraction patterns, suggesting some degree of uterine incoordination was found during the active phase of labour in 10 patients, 8 of whom were primiparae. This incoordination could not be related to the effect of induction with either drug. Incoordinated contractions were associated with longer duration of labour and a tendency to more pronounced acidosis in the infant at birth, although mean values still fell in the normal range. Ominous FHR patterns were only seen in 2 cases of uterine hyperactivity during induction of labour.

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Accession: 039047608

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PMID: 998176


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