Uterus The pear-shaped, reproductive organ from which people menstruate and where a pregnancy develops. Also called “womb.” Related Articles: Yes, You Can Take Plan B All of the Time and Be FINE!Contrary to a commonly misguided belief, the morning after pill isn't "the abortion pill." Really, it's no different than your traditional birth control pill.Glossary: ConceptionGlossary: GynecologyGlossary: Pelvic inflammatory disease (PID)Glossary: Xx chromosomes Uterine perforation UTI (urinary tract infection)