Adolescence is a time of rapid developmental change and emotional upheaval as teenagers strive to assert their autonomy. In a similar vein, pregnancy--even under optimal circumstances with an adult mother--has been labelled a developmental crisis. Pregnancy during the teenage years has a synergistic effect, magnifying maturational changes in both the teenage girl and her infant. Recommended intervention strategies in cases of adolescent pregnancy should address not only the imminent mother-infant relationship, but the dyad's future transformations. One intervention technique is previewing, which is derived from the rhythms of adaptive exchange between mature mothers and their infants. The aim of previewing with adolescent parents is to help the teenager become more attuned to the infant's imminent developmental skills and to heighten their rapport.