Table 4 Metabolism of energy substrate by 8- cell embryos that were derived in vitro or in vivo

(a)Productionof CO2(p moles)

Pyruvate

2.52 ± 0.26

2.20 ± 0.46

Lactate

2.30 ± 0.49^c

0.50 ± 0.8^d

Glucose

0.28 mmol/L

0.29 ± 0.10

0.19 ± 0.05

0.56 mmol/L

0.36 ± 0.80

  NP

(b)Incorporation(pg atoms)

Pyruvate

1.27 ± 0.04

1.30 ± 0.93

Lactate

1.53 ± 0.38

0.76 ± 0.13

Glucose

0.28 mmol/L

3.00 ± 0.70^a

4.50 ± 0.24^b

0.56 mmol/L

4.72 ± 0.59^b

  NP