Final answer:
The typical pattern of uterine involution involves three stages during postpartum recovery: cervix thinning and dilation, baby expulsion through uterine contractions and pushing, and passage of the placenta after birth.
Step-by-step explanation:
The typical pattern of uterine involution involves three stages during postpartum recovery. In stage one, the cervix thins and dilates to about 10 cm. In stage two, the baby is expelled from the uterus through uterine contractions and pushing by the mother. Stage three involves the passage of the placenta after the baby is born.
It's important to note that postpartum uterine contractions help limit blood loss, while the mother may experience a postpartum vaginal discharge called lochia, which consists of uterine lining cells, erythrocytes, leukocytes, and other debris.