| OGF | ovarian growth factor; oxygen gain factor |
|---|---|
| OHS | obesity hypoventilation syndrome; occipital Horn syndrome; occupational health service; ocular histo... |
| OHSS | ovarian hyperstimulation syndrome |
| OPSA | ovarian papillary serous adenocarcinoma |
| OSA | obstructive sleep apnea; Office of Services to the Aging; Optical Society of America; ovarian sectio... |