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Stages of Labor
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Stage I
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From onset of contractions through full effacement and dilatation of
cervix (latent phase, 0–3 cm; active phase,
4–7 cm; transition phase, 8–10 cm). Duration: 8–18
hours.
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Stage II
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From full dilatation of cervix until delivery of baby. Duration: 15–90
minutes.
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Stage III
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From birth of baby until expulsion of placenta. Duration: < 20 minutes.
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Stage IV
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First 1–2 hours after expulsion of placenta.
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7/15/14
Stages of Labor
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