Describe the events of labor and delivery.
1. Dilation stage
2. Expulsion stage
3. Placental stage
Answer: Labor and delivery of an infant can be divided into three stages.
1. Dilation stage—Uterine muscles are strongly contracting and pressing the baby against the cervix. Causes the cervix to dilate and become thinner (which is called effacement).
2. Expulsion stage—When the cervix is dilated to 10 cm this stage begins. Uterine contractions now are pushing baby through the birth canal. This stage ends with the birth of the baby.
3. Placental stage—After the baby has been delivered, uterine contractions continue until the placenta (afterbirth) is delivered.
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