No abstract available
MeSH terms
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Abortion, Spontaneous / epidemiology
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Abortion, Spontaneous / etiology
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Amniocentesis / adverse effects
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Amniocentesis / methods*
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Amniocentesis / standards
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Chorionic Villi Sampling / adverse effects
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Chorionic Villi Sampling / methods*
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Chorionic Villi Sampling / standards
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Female
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Humans
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Pregnancy
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Ultrasonography, Prenatal / methods*
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Ultrasonography, Prenatal / standards