The objectives of this study are to further our understanding of maternal prepubertal adversity on fetal and infant neuroendocrine development. This study utilizes 3-D ultrasound to measure fetal adrenal gland volume, a battery of psychosocial/behavioral assessments to determine the degree of maternal stress and prepubertal adversity, and an acoustic startle paradigm and Trier Social Stress Test (TSST) to assess maternal arousal. This study also utilizes an infant stress test to assess infant arousal.