Roles of hCG in Advancing Follicular Growth to Ovulation after Concurrent Injections of PGF_𝟐𝛼 and GnRH in Postpubertal Holstein Heifers Bearing a CL

Table 1

Means and standard errors for size (mm) of ovulating follicle and days to ovulation.

Treatment	𝑁	Follicle size			Days to ovulation*
		Day 0	Day 2	Preovulation**
PGF	11	2.79±0.99^a	2.80±0.09^a	11.0±0.8^a	5.70±0.42^a
PGF + GnRH	11	2.78±1.04^a	2.82±0.08^a	10.7±1.1^a	5.00±0.56^a
PGF + GnRH + hCG	11	2.77±1.04^a	2.81±0.09^a	11.1±0.6^a	3.64.1±0.34^b

^aMeans within the same column lacking a common superscript are significantly different (𝑃<.05)
*Days from injection of PGF_2𝛼
**24 h before ovulation.