Evaluating the effect of a breastfeeding consultant on the duration of breastfeeding.
D000293:Adolescent; D000328:Adult; D001942:Breast Feeding; D003376:Counseling; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008425:Maternal Behavior; D011897:Random Allocation