Congenital anorectal disorders are birth defects in which the rectum or anus does not form normally. Symptoms are spotted in the delivery room or within the first day of life. Missing anal opening is the obvious clue. The bottom is flat or the hole is absent, and a thermometer or finger cannot enter. Meconium leaks from the wrong place. The first stool exits through a tiny opening near the scrotum, vagina, or perineum instead of the anus. Swollen belly appears fast. The abdomen puffs and feels tight as stool backs up. No gas or stool is passed. The baby does... Learn more