No abstract available
MeSH terms
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Adult
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Electrocardiography*
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Female
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Fetal Diseases / diagnosis
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Fetal Diseases / epidemiology
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Fetal Heart / drug effects
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Fetal Monitoring*
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Humans
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Meperidine / adverse effects
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Obstetric Labor Complications / diagnosis*
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Obstetric Labor Complications / epidemiology
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Pregnancy