Table 3. Embryo recovery rate and embryo classification of different NR groups

Parameter NR (%)
80 100 120
Number of cows 6 8 5
Total number of recovered embryos 34 (5.7 ± 2.9) 70 (8.7 ± 4.8) 32 (6.4 ± 2.4)
Number of excellent 13 (2.2 ± 1.7) 23 (2.9 ± 2.0) 24 (4.8 ± 1.9)
Number of good 6 (1.0 ± 0.6) 12 (1.5 ± 1.5) 5 (1.0 ± 0.7)
Number of fair 0 2 (0.3 ± 0.5) 0
Number of others 15 (2.5 ± 2.0) 33 (4.1 ± 2.8) 3 (0.6 ± 0.6)
Total number of transferable embryos 19 (3.2 ± 2.0) 37 (4.4 ± 2.9) 29 (5.8 ± 1.9)
Transferable embryos / recovered embryos (%) 55.9b 50.0b 90.6a
All values are mean ± standard deviation.
Values with different superscripts within a row (p < 0.01).
Recovered embryos were evaluated and divided into transferable and non-transferable embryo groups. Transferable embryo group selected from morulae to expanded blastocyst and divided into code 1 (excellent and good) and code 2 (fair). Non-transferable embryo group include the others; unfertilized oocytes, degenerated embryos, poor quality embryos having blastomeres of less than 16.
NR, nutrient requirements.