| ATC codes | 
|---|
| G Genito-urinary system and sex hormones | 
| G01 Gynecological antiinfectives and antiseptics | 
| G02 Other gynecologicals | 
| G03 Sex hormones and modulators of the genital system | 
| G04 Urologicals | 
| ATCvet only | 
| QG51 Antiinfectives and antiseptics for intrauterine use | 
| QG52 Products for teats and udder | 
|  | 
ATC code G03 Sex hormones and modulators of the genital system is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the WHO for the classification of drugs and other medical products. Subgroup G03 is part of the anatomical group G Genito-urinary system and sex hormones.
Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QG03. ATCvet codes without corresponding human ATC codes are cited with the leading Q in the following list.
National issues of the ATC classification may include additional codes not present in this list, which follows the WHO version.