Effect of amniotic membrane rupture on length of labor

Obstetrics and Gynecology (Impact Factor: 5.18). 11/1987; 70(4):604-7.
Source: PubMed


Between January 1, 1979, and December 21, 1982, 2564 medically and obstetrically normal patients, admitted to the hospital with intact amniotic membranes during the latent phase of labor, were matched for spontaneous or artificial rupture of the membranes at similar cervical dilations. Spontaneous rupture of the membranes occurred earlier and was more likely in the latent phase of labor than was artificial rupture of membranes, which tended to occur nearer to or in the active phase of labor, and at lower pelvic stations. When matched by cervical dilation, spontaneous membrane rupture was associated with more rapid cervical dilation. Stepwise regression analysis confirmed that membrane rupture had a significant but small effect on labor length and rate of cervical dilation. Pelvic station and maternal parity had a smaller association with labor length than did membrane rupture. Cervical dilation at the time of membrane rupture appeared to be the most important factor associated with the length of labor.

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    • "4. Amniotomy is contraindicated because fetal heart abnormalities are more likely in the healthy, term fetus (Barrett et al., 1992; Fraser et al., 1993; Kariniemi, 1983) and it may cause umbilical cord prolapse (Levy et al., 1984). Amniotomy has little effect on labour length (Barrett et al., 1992; Rosen and Peisner, 1987; Seitchik et al., 1985) and it does not reduce the caesarian section rate (Barrett et al., 1992; Fraser et al., 1993). 5. Olsen (1997) carried out a meta-analysis of the relative safety of homebirth compared to hospital birth. "
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    International Journal of Health Care Quality Assurance 02/2009; 22(1):55-66. DOI:10.1108/09526860910927952
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    • "Amniotomy is contraindicated because fetal heart abnormalities are more likely in the healthy, term fetus (Kariniemi 1983, Barrett et al 1992, Fraser et al 1993, Garite et al 1993) and it may cause umbilical cord prolapse (Levy et al 1984). Amniotomy has little effect on labour length (Seitchik et al 1985, Rosen & Peisner 1987, Barrett et al 1992), and it does not reduce the caesarean section rate (Barrett et al 1992, Fraser et al 1993, Garite et al 1993). demands of the 'authority', usually the employing NHS trust, may come into conflict with what an individual midwife perceives as a more appropriate course of action which is within the remit of their professional and statutory role. "
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    ABSTRACT: Most people will have observed the often impressive synchrony of the behavior of fish in a school or birds in a flock. The fact that the behavior of a fish is so well matched to that of the behavior of others is straightforward: Perception directly affects behavior. When a fish perceives a change of direction in another fish it simply matches this change in direction. This direct link between perception and behavior can be easily witnessed in humans as well. We too match the behavior of others and we do this simply because perception directly affects action. The specific behavioral changes perception can bring about differ between humans and fish, but the underlying mechanism is essentially the same. Perhaps we share this important psychological mechanism with a haddock. (Dijksterhuis, 2001, p. 105)
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