Unexplained differences in first stage labor duration in primiparas at North American and European hospitals.
Thomson
M
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D002584:Cervix Uteri / Q000502:physiology; D005060:Europe; D005260:Female; D006801:Humans; D007747:Labor Stage, First / Q000187:drug effects / Q000502:physiology*; D007743:Labor, Obstetric / Q000502:physiology*; D010121:Oxytocin; D011247:Pregnancy; D044469:Racial Groups; D013997:Time Factors; D014481:United States
D010121:Oxytocin