A Woman Gave Birth to a Healthy 7-Pound, 13-Ounce Infant

A woman gave birth to a healthy 7-pound, 13-ounce infant girl. The nurse suggests that the woman place the infant to her breast within 15 minutes after birth. The nurse knows that breastfeeding is effective during the first 30 minutes after birth because this is the:

A) Transition period.
B) First period of reactivity.
C) Organizational stage.
D) Second period of reactivity.