. 2020 Oct 21;100(2):1098–1108. doi: 10.1016/j.psj.2020.10.017

Table 3.

Mean diameter of different follicular categories within the ovaries of ducks and geese during the first 6 post-hatching week.

Species	Week of age	Primordial follicle diameter (μm)	Primary follicle diameter (μm)	Secondary follicle diameter (μm)
Duck	1	45.41 ± 7.27^d	65.52 ± 7.24^c	N.A.
	2	56.74 ± 10.32^c	109.74 ± 9.32^b	N.A.
	3	62.56 ± 8.57^b	109.21 ± 11.89^b	166.95 ± 21.22^d
	4	65.83 ± 11.14^a,b	109.33 ± 12.49^b	277.25 ± 33.89^c
	5	65.51 ± 5.22^a,b	123.23 ± 21.77^b	286.04 ± 43.58^b
	6	70.87 ± 8.88^a	146.80 ± 36.87^a	342.68 ± 49.31^a
Goose	1	53.97 ± 8.69^d	85.94 ± 16.19^d	N.A.
	2	55.87 ± 11.11^c,d	101.06 ± 18.60^c	N.A.
	3	61.12 ± 10.82^b,c	107.70 ± 12.96^c	N.A.
	4	62.42 ± 9.67^b	134.21 ± 13.58^b	206.61 ± 31.15^b
	5	63.21 ± 10.58^b	136.17 ± 18.41^b	210.60 ± 19.59^b
	6	71.38 ± 5.90^a	151.58 ± 31.67^a	226.73 ± 20.60^a
P-value	Species effect	0.8914	0.0045	<0.0001
	Age effect	<0.0001	<0.0001	<0.0001
	Interaction effect	0.0051	0.0115	0.0089

^a–dDifferent lowercase letters indicate significant differences in the same follicular category of the same species across weeks at P < 0.05.

Abbreviation: N.A., not available.