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| {| {{table}} | | |
| | align="center" style="background:#f0f0f0;"|'''Stage''' | | {{clade |
| | align="center" style="background:#f0f0f0;"|'''Info''' | | |label1=[[Acari]] |
| | align="center" style="background:#f0f0f0;"|'''Image''' | | |1={{clade |
| |- | | |label1=[[Parasitiformes]] |
| |1st: Dilation | | |1={{clade |
| | | | |label1='''Ixodida''' (ticks) |
| *Latent
| | |1={{clade |
| **Passage of cervical mucous plug
| | |1=[[Nuttalliellidae]] (a southern African tick) |
| **Slow dilation to 3 cm
| | |2={{clade |
| *Active
| | |1=[[Ixodidae]] (hard ticks) |
| **Rapid cervical dilation from 3 cm to 10 cm
| | |2=[[Argasidae]] (soft ticks) |
| *~8 hours in primiparous and ~5 hours in multiparous
| | }} |
| | | | }} |
| [[Image:Stage 1.png|400px]] | | |2=[[Mesostigmata]] (mites, inc. ''[[Varroa]]'') |
| |- | | }} |
| |2nd: Birth
| | |2=[[Acariformes]] (mites) |
| |
| | }} |
| *Cervix fully dilated
| | }} |
| *Urge to push
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| *Expulsion of infant
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| *~20 - 50 minutes
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| [[Image:Stage 2.png|400px]] | |
| |-
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| |3rd: Placental delivery
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| *~20 minutes
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| **>18 minutes increases risk of [[postpartum hemorrhage]] with >30 minutes conferring very increased risk
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| [[Image:Stage 3.jpg|400px]] | |
| |-
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| |4th stage | |
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| *1st hour after placental delivery
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| *Period of time with highest risk for [[postpartum hemorrhage]]
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| |}
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