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Table 5 Comparative metabolism of glucose by embryos produced in vitro (IVM/IVF), obtained by flushing the uterus and used immediately (fresh) or obtained from the uterus and cultured in vitro for 1–3 days (fresh + IVC)

From: Metabolism of energy substrates of in vitro and in vivo derived embryos from ewes synchronized and super ovulated with norgestomet and porcine follicle stimulating hormone

Biochemical parameter/source of embryo

Morula

Stages early blastocyst

Development Mid blastocyst

Blastocyst

Hatched blastocyst

   

(a)Catabolic

  
   

Utilization (Ι)

  
   

CO 2

  
   

(p moles/h)

  

IVM/

7.00 ± 1.50a

8.21 ± 1.90a

8.00 ± 0.12

9.80 ± 1.50

10.65 ± 1.40

Fresh

3.00 ± 0.55b

4.15 ± 0.21b

7.20 ± 0.50a

NP

NP

Fresh+IVC

NP

NP

10.13 ± 0.38b

9.24 ± 0.32

10.35 ± 0.75

   

(ΙΙ)Lactate

  
   

Production

  
   

(p moles/h)

  

IVM/IVF

24.80 ± 5.57a

26.00 ± 6.30a

43.94 ± 7.60b

69.14 ± 4.50a

66.14 ± 8.63

Fresh

10.82 ± 1.40b

10.02 ± 1.43b

20.60 ± 5.97a

NP

NP

Fresh+IVC

NP

NP

38.54 ± 1.55b

39.52 ± 8.65b

54.13 ± 20.94

   

(b)Incorporation

  
   

(p mole/h)

  

IVM/IVF

17.70 ± 4.13

18.00 ± 5.07

14.92 ± 2.04a

21.71 ± 4.52

21.88 ± 2.01

Fresh

13.66 ± 1.76

15.50 ± 0.73

17.00 ± 0.58a

NP

NP

Fresh+IVC

NP

NP

43.43 ± 10.67b

27.96 ± 3.70

30.21 ± 9.96

  1. Values are means ± SEM (per embryo per h); NP: not performed a,b differ significantly within biochemical parameter in each row or column of a stage of development (p < 0.05).