| LCO | low cardiac output |
|---|---|
| LCOS | low cardiac output syndrome |
| LOS | length of stay; Licentiate in Obstetrical Science; lipo-oligosaccharide; low cardiac output syndrome... |
| LVSO | left ventricular systolic output |
| MAO | Master of the Art of Obstetrics; maximal acid output; monoamine oxidase |