Pushing for first-time moms.
Lemay
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D036861:Delivery, Obstetric / Q000379:methods* / Q000523:psychology; D005260:Female; D006801:Humans; D007743:Labor, Obstetric / Q000502:physiology; D008880:Midwifery / Q000379:methods*; D010298:Parity / Q000502:physiology*; D011247:Pregnancy