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Table 1 Least square means (LSM ± SE) of the size of dominant follicles at ovulation following oestrous synchronisation

From: Ovarian follicular response to oestrous synchronisation and induction of ovulation in Norwegian Red cattle

VariableClassnSize, LSM ± SE
Herd1913.2 ± 1.5a
21019.6 ± 1.6b
3614.8 ± 1.5
41915.8 ± 1.2
AgeHeifers 14‒15 months1015.9 ± 1.0
Heifers 16‒18 months1317.1 ± 1.0
Heifers 19‒28 months1113.4 ± 1.5
Cows parity 1‒31016.9 ± 1.6
Initial follicle sizec≤ 10.0 mm2115.4 ± 0.7
> 10.0 mm2316.3 ± 0.8
BCSLean (2.5‒2.9)615.5 ± 1.7
Moderate (3.0‒3.4)2015.2 ± 0.9
Fat (3.5‒4.0)1816.9 ± 0.8
  1. Number of animals (n) and least square means (LSM) ± standard error (SE) for size of the dominant follicle (diameter, mm) at ovulation by herd, and classes of age, initial follicle size1, and body condition score (BCS)
  2. a,bLSM within variable and column with different superscripts differ; P < 0.05
  3. cDiameter of the dominant follicle at the time of GnRH analogue treatment (T0)