Table 2.
Item | Treatment |
Ovulation inducers (GnRH+hCG) |
P-value |
||||||
---|---|---|---|---|---|---|---|---|---|
Control | GnRH | hCG | Treatment | Ovulation inducers | Parity | Treatment × parity | Ovulation inducers × parity | ||
Fresh IVP blastocyst embryos | |||||||||
P/ET 37 d, % (n) | |||||||||
Overall | 46.4 (112) | 54.1 (114) | 60.2 (108) | 58.1 (222) | 0.31 | 0.16 | 0.002 | 0.61 | 0.30 |
Nulliparous | 51.2 (43)a,b, A,B | 67.8 (59)a,b, A,B | 74.5 (51)b | 70.9 (110) | 0.06 | 0.02 | — | — | — |
Primiparous | 44.7 (47) | 43.3 (30) | 48.7 (37) | 46.3 (67) | 0.90 | 0.87 | — | — | — |
Multiparous | 40.9 (22) | 44.0 (25) | 45.0 (20) | 44.4 (45) | 0.96 | 0.78 | — | — | — |
Calving/ET,1 % (n) | |||||||||
Overall | 37.4 (107) | 42.1 (107) | 48.1 (102) | 45.0 (209) | 0.37 | 0.30 | 0.13 | 0.90 | 0.95 |
Nulliparous | 42.5 (40) | 51.0 (53) | 52.2 (46) | 51.2 (99) | 0.63 | 0.34 | — | — | — |
Primiparous | 35.6 (45) | 31.0 (29) | 47.2 (36) | 40.0 (65) | 0.37 | 0.64 | — | — | — |
Multiparous | 31.8 (22) | 36.0 (25) | 40.0 (20) | 37.8 (45) | 0.86 | 0.63 | — | — | — |
Pregnancy loss,1 % (n) | |||||||||
Overall | 14.9 (47) | 21.0 (57) | 17.0 (59) | 19.0 (116) | 0.80 | 0.66 | 0.98 | 0.80 | 0.21 |
Nulliparous | 10.5 (19) | 21.0 (34) | 27.3 (33) | 23.9 (67) | 0.38 | 0.11 | — | — | — |
Primiparous | 15.8 (19) | 25.0 (12) | 0.0 (17) | 10.3 (29) | 0.82 | 0.58 | — | — | — |
Multiparous | 22.2 (9) | 18.2 (11) | 11.1 (9) | 15.0 (20) | 0.82 | 0.64 | — | — | — |
Fresh IVP expanded blastocyst embryos | |||||||||
P/ET 37 d, % (n) | |||||||||
Overall | 60.7 (631)B | 60.9 (723)B | 56.2 (726)A | 58.2 (1,449) | 0.14 | 0.28 | <0.001 | 0.39 | 0.72 |
Nulliparous | 65.9 (355) | 65.8 (404) | 64.8 (400) | 65.3 (804) | 0.93 | 0.84 | — | — | — |
Primiparous | 55.2 (203)a,b, A,B | 59.3 (216)b | 47.1 (208)a,b, A,B | 53.3 (424) | 0.04 | 0.66 | — | — | — |
Multiparous | 50.7 (73) | 44.7 (103) | 43.2 (118) | 43.9 (221) | 0.59 | 0.31 | — | — | — |
Calving/ET,1 % (n) | |||||||||
Overall | 50.0 (608)b | 50.3 (684)a,b, A,B | 45.0 (689)a,b, A,B | 47.6 (1,373) | 0.08 | 0.16 | <0.001 | 0.42 | 0.41 |
Nulliparous | 54.2 (343) | 55.4 (381) | 53.3 (377) | 54.4 (758) | 0.88 | 0.97 | — | — | — |
Primiparous | 45.6 (195)ab | 48.6 (208)b | 37.6 (197)a | 43.2 (405) | 0.07 | 0.57 | — | — | — |
Multiparous | 41.4 (70) | 33.7 (95) | 30.4 (115) | 31.9 (210) | 0.23 | 0.15 | — | — | — |
Pregnancy loss,1 % (n) | |||||||||
Overall | 15.6 (360) | 14.2 (401) | 16.4(371) | 15.3 (772) | 0.50 | 0.55 | 0.56 | 0.60 | 0.49 |
Nulliparous | 16.2 (222) | 13.2 (243) | 14.8 (236) | 14.0 (479) | 0.65 | 0.44 | — | — | — |
Primiparous | 14.4 (104) | 15.8 (120) | 14.9 (87) | 15.5 (207) | 0.96 | 0.81 | — | — | — |
Multiparous | 14.7 (34) | 15.8 (38) | 27.1 (48) | 22.1 (86) | 0.29 | 0.37 | — | — | — |
Vitrified IVP | |||||||||
P/ET 37 d, % (n) | |||||||||
Overall | 51.8 (197)A | 59.9 (177)B | 57.8 (161) | 58.9 (338) | 0.20 | 0.08 | <0.001 | 0.74 | 0.47 |
Nulliparous | 62.3 (69)A | 76.9 (65)B | 71.4 (56) | 74.4 (121) | 0.18 | 0.08 | — | — | — |
Primiparous | 48.3 (87) | 48.6 (72) | 50.8 (65) | 49.6 (137) | 0.95 | 0.84 | — | — | — |
Multiparous | 41.5 (41) | 52.5 (40) | 50.0 (40) | 51.3 (80) | 0.5 | 0.31 | — | — | — |
Calving/ET,1 % (n) | |||||||||
Overall | 43.2 (190)A | 53.0 (166)B | 45.7 (151) | 49.5 (317) | 0.15 | 0.13 | <0.001 | 0.42 | 0.27 |
Nulliparous | 52.9 (68)a | 73.0 (63)b | 59.6 (52) | 67.0 (115) | 0.06 | 0.06 | — | — | — |
Primiparous | 39.3 (84) | 36.9 (65) | 37.7 (61) | 37.3 (126) | 0.95 | 0.77 | — | — | — |
Multiparous | 34.2 (38) | 47.4 (38) | 39.5 (38) | 43.4 (76) | 0.50 | 0.35 | — | — | — |
Pregnancy loss,1 % (n) | |||||||||
Overall | 13.7 (95) | 7.4 (95) | 16.9 (83) | 11.8 (178) | 0.18 | 0.99 | 0.24 | 0.78 | 0.56 |
Nulliparous | 14.3 (42) | 4.2 (48) | 13.9 (36) | 8.3 (84) | 0.25 | 0.31 | — | — | — |
Primiparous | 15.4 (39) | 14.3 (48) | 20.7 (29) | 17.5 (57) | 0.78 | 0.78 | — | — | — |
Multiparous | 7.1 (14) | 5.3 (19) | 16.7 (18) | 10.8 (37) | 0.50 | 0.70 | — | — | — |
Means within a row with different lowercase superscripts differ (P < 0.05).
Means within a row with different uppercase superscripts tend to differ (P ≤ 0.10).
Pregnant culled animals (n = 153: sold for dairy n = 15; sold for beef n = 70; died n = 68).