. 2018 Winter;19(1):15–21.

Table 1.

Follicular dynamics and corpus luteum formation in a group of Holstein heifers that received eCG (500 IU, IM) throughout the FFW: on the day of follicle emergence (group 1; n=5), at the dominant phase (group 2; n=5) and at the early static phase (group 3; n=5) compared to control (n=5). Data were presented as mean±SEM

Parameters	Control	Group 1	Group 2	Group 3
Estrus cycle
Length	20.4 ± 0.24^a	21.5 ± 0.65^ab	22.8 ± 0.49^b	22.8 ± 0.73^b
Number of follicular wave	2	2	2	2
Follicle growth rate (mm/day)
First wave follicle growth rate	1.2 ± 0.1^a	1.6 ± 0.15^a	1.6 ± 0.13^a	1.3 ± 0.23^a
Second wave follicle growth rate	1.1 ± 0.08^ab	0.8 ± 0.13^a	1.4 ± 0.11^b	1.1 ± 0.07^ab
Follicle characteristics
Day of DF detection	4.8 ± 0.37^a	3.2 ± 0.25^b
Maximum diameter of the first wave DF	12.3 ± 0.49^a	13.7 ± 0.73^a	18.3 ± 0.47^b	17.3 ± 0.65^b
The day in which the first wave DF reached at maximum diameter	6.4 ± 0.4^a	6.2 ± 0.48^a	9.8 ± 0.86^b	9.7 ± 0.85^b
Day of the second follicle wave emergence	7.6 ± 0.24^a	9^a	13 ± 0.89^b	13 ± 0.63^b
Day of follicle regression	9.2 ± 0.37^a	9.2 ± 0.25^a	12.4 ± 0.75^b	13.7 ± 1.31^b
Corpus luteum characteristics
Maximum CL diameter	21.2 ± 0.81^a	25.3 ± 1.03^b	24.3 ± 1.19^b	25.5 ± 0.94^b
The day in which CL reached at maximum diameter	6.8 ± 0.37^a	8.2 ± 0.25^b	9.2 ± 0.25^b	9.2 ± 0.37^b

^ab

Values within rows with different superscripts differ (P<0.05)