BJOG : an international journal of obstetrics and gynaecology
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Multicenter Study
Spontaneous contractions of myometrium from humans, non-human primate and rodents are sensitive to selective oxytocin receptor antagonism in vitro.
To determine whether: 1. oxytocin receptor antagonists influence spontaneous contractions of myometrium from humans, non-human primates and rodents (in vitro), and 2. vasopressin V1a receptor antagonism is important for inhibition of spontaneous contractions in human myometrium. ⋯ Spontaneous contractions of myometrium from humans, marmosets and rats are, at least in part, dependent on oxytocin receptor activity, in vitro. L-371,257 and atosiban may be inverse agonists. Selective non-peptide oxytocin receptor antagonists may be effective tocolytics.
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To determine whether the higher levels of obstetric intervention and maternity service use among older women can be explained by obstetric complications. ⋯ Higher levels of intervention among older women are not explained by the obstetric complications we considered.