Time point | Percentage |
---|
| ER-α+
| PR+
|
---|
Week 11 | 27.8 | 28.5 |
Group 1 early | 45.0 | 31.1 |
Group 2 early | 23.7 | 19.1 |
Group 3 early | 29.7 | 24.7 |
Group 1 late | 22.7 | 25.9 |
Group 2 late | 26.1 | 30.8 |
Group 3 late | 31.9 | 25.5 |
- One thousand epithelial cells were counted in mammary gland sections stained for ER-α or PR. Group I animals received estradiol injections; group II received estradiol and progesterone; and group III received estradiol, progesterone, and prolactin. ER, estrogen receptor; LREC, label-retaining epithelial cell; PR, progesterone receptor.