From: Differential genome-wide gene expression profiling of bovine largest and second-largest follicles: identification of genes associated with growth of dominant follicles
Follicle
E2 (ng/ml)
P4 (ng/ml)
E2/P4 ratio
Healthy
180.0 ± 44.9
15.9 ± 15.3
4.3 ± 0.8
Atretic
41.4 ± 5.3*
387.7 ± 121.7*
0.1 ± 0.1*