Table 1. Ovarian and follicle phenotypic measurements for Low A4 and High A4 cows.

Item	Low A41	High A42	SEM	P-value
Follicle aspirations3
n	11	15
Follicle diameter, mm	13.38	13.27	1.18	0.90
Follicular fluid, mL	1.57	0.98	0.41	0.08
Ovariectomies4
n	28	36
Follicle diameter, mm	14.21	15.01	0.75	0.30
Follicular fluid, mL	1.09	1.33	0.10	0.07
Theca cell weight, g	0.07	0.08	0.01	0.23
Granulosa cell weight, g	0.08	0.06	0.01	0.24
Theca:Granulosa weight	1.20	1.83	0.30	0.05
Ovarian area, mm2	629	684	46	0.25
Ovarian weight, g	7.27	8.13	0.72	0.29
Surface AFC5	53	46	4	0.19
Ultrasound AFC5	28	31	2	0.26
Ovarian area, mm2	629	684	46	0.25

¹Dominant follicle follicular fluid A4 concentration of <20 ng/mL.

²Dominant follicle follicular fluid A4 concentration of >40 ng/mL.

³Follicle aspirations were taken 12–48 hours after two injections of Prostaglandin F2alpha (PG).

⁴Ovariectomies were conducted after modified cosynch protocol 36 hours after PG.

⁵Where AFC = antral follicle count.