| AASH | adrenal androgen stimulating hormone; American Association for the Study of Headache |
|---|---|
| ACCESS | Ambulatory Care Clinic Effectiveness Systems Study; automated cervical cell screening system |
| APSS | Association for the Psychophysiological Study of Sleep |
| ASHI | Association for the Study of Human Infertility |
| ASIF | Association for Study of Internal Fixation |