These texts explore and reflect Greek and Roman ideas about gender, sexuality, sexual reproduction, obstetrics, gynecology, and the like. They include sources written from medical and scientific perspectives (e.g. works attributed to Hippocrates and Aristotle), poetic tragedies, epic poems like Lucretius' epic poem De Rerum Natura (On the Nature of Things), papyrological evidence such as contracts for wet nurses and female caregivers, and more.