Congenital anorectal malformation means the rectum and/or anus didn’t form normally before birth. The defect ranges from a narrow opening to a complete missing anal hole, so symptoms are noticed in the delivery room. No anal opening is the obvious clue. The baby’s bottom is flat or the hole is missing, and the midwife can’t insert a thermometer. Stool passes in the wrong place. Meconium leaks from a tiny opening near the scrotum, vagina, or along the perineum. Swelling or bulging shows up when stool backs up. The lower belly puffs and feels tight within the first day of life.... Learn more