Stage 3 of Labor

By Carolyn Kisner PT, MS and Lynn Allen Colby PT, MS on February 24th 2009

Placental stage (expulsion of the placenta). After delivery, the uterus continues to contract and shrink, causing the placenta to detach and be expelled.

• As the uterus decreases in size, the placenta detaches from the uterine wall, blood vessels are constricted, and bleeding slows. This can occur 5 to 30 minutes after the baby is delivered.

• A hematoma forms over the uterine placental site to prevent further significant blood loss; mild bleeding persists for 3 to 6 weeks after delivery.

Uterine involution. The uterus continues to contract and decrease in size for 3 to 6 weeks after delivery; the uterus always remains slightly enlarged over its prepregnant size.

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Tags: Labor, Phases, Stage 3

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