Results

Day of Pregnancy Estradiol pg/ml

Day 1 Day5 Day 10 Day 15 Day 20

8.0 ± 1.9 9.2 ± 1.0 21.0+1.7 137.1+5.4 89.6 + 9.8

Table 2. Serum Levels of E2, Mammary Cancer Incidence, and Multiplicity in E2. Rats.

Treatment

E2 pg/ml

Mammary Cancer % incidence

Mammary Cancer Multiplicity

Control

8.0 ± 1.9

92

2.50

10 ng E2

5.8 ± 1.0

78

1.40

100 ng E2

30.1 ±5.0

65

1.25

1 ng estradiol

118,0 ± 9.8

0

0

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