| E2 | 17β-estradiol |
| 2-OHE | 2-hydroxyestrogen |
| 4-OHE | 4-hydroxyestrogen |
| 2-ClE2 | 2-chloro-17β-estradiol |
| 4-ClE2 | 4-chloro-17β-estradiol |
| EE2 | 17α-ethinylestradiol |
| 2-ClEE2 | 2-chloro-17α-ethinylestradiol |
| 4-ClEE2 | 4-chloro-17α-ethinylestradiol |
| 2-FE2 | 2-fluoro-17β-estradiol |
| 4-FE2 | 4-fluoro-17β-estradiol |
| ACI | August Copenhagen Irish |
| HRT | Hormone replacement therapy |
| OVX | Ovariectomized |
| bw | Body weight |
| RIA | Radioimmunoassay |