Table I.

Developmental competence (mean±SE) of bovine oocytes originating from different follicle size of ovaries bearing a corpus luteum (CL) or not bearing a CL (replicates = 6)

Groups		Oocytes (n)	Expansion (%)	Cleavage (%)	Blastocysts per total oocytes (%)	Blastocysts per cleavage (%)
CL effect (main effect) 1	C CL- CL+	251 531 548	89.2 ± 6.1 89.8± 3.1 85.1 ± 3.2	84.3 ± 3.0 84.2 ± 4.7 78.3 ± 2.8	35.0 ± 0.8 40.2 ± 3.6 31.4 ± 3.4	40.0 ± 0.7 45.7 ± 4.9 38.6 ± 4.2
Size effect (main effect) 2	C S M L	251 435 494 150	89.2 ± 6.1 a 72.1± 3.6b 81.3 ± 2.4a 90 ± 3.2a	84.3 ± 3.0 79.1 ± 2.7 84.4± 2.3 80.5 ± 6.5	35.0 ± 0.8 30.8 ± 3.8 38.3 ± 3.2 41.3 ± 5.4	40.0 ± 0.7 36.2 ± 4.9 41.0 ± 3.9 46.8 ± 7.6
CL and size effect (Interactions) 3	C CL-.S CL-.M CL-.L CL+.S CL+.M CL+.L	251 217 236 78 218 258 72	89.2 ± 6.1 84.8 ± 5.1 88.0 ± 2.1 90.4 ± 4.8 82.4 ± 2.8 83.2 ± 3.5 86.1 ± 6.9	84.3 ± 3.0 81.9 ± 4.9 86.5± 2.6 84.1 ± 12.5 76.1 ± 2.4 82.0± 3.1 76.6 ± 5.5	35.0± 0.8b 36.9 ± 4.0ab 38.7 ± 5.3a 40.4 ± 8.9a 30.8 ± 6.7c 33.6 ± 3.7bc 35.1 ± 6.7b	40.0± 0.7ab 39.9 ± 5.4ab 43.6 ± 6.4a 46.1 ± 13.1a 36.8 ± 8.6b 38.8 ± 4.7b 40.7 ± 8.9ab

CL: Corpus luteum

Abc; Values in the column with different superscripts differ significantly (p < 0.001). (Student's t-test).

1; CL+, CL- and C: Ovaries bearing a CL, not bearing a CL and control ovaries, respectively.

2; S, M, and L: Oocytes originating from small, medium and large follicles, respectively.

3; CL-.S, CL-.M and CL-.L: Oocytes originating from small, medium and large follicles of ovaries not bearing a CL, respectively.

CL+.S, CL+.M and CL+.L: Oocytes originating from small, medium and large follicles of ovaries bearing a CL, respectively.