Table 2 Development potential of oocytes and embryos after 4 weeks of CUMS

No. of mice

20

20

20

20

No. of oocytes^a

32 ± 7

29 ± 5

22 ± 6*

15 ± 5*

<0.05

Fertilization rate^b

87 %

78 %

61 %*

40 %*

<0.05

No. of 2-cell embryos^a

27 ± 5

22 ± 4

15 ± 5*

9 ± 2*

<0.05

No. of D4 embryos^a

24 ± 4

18 ± 3

10 ± 4*

4 ± 2*

<0.05

No. of high quality embryos^a

20 ± 5

13 ± 4

5 ± 2*

1 ± 1*

<0.05

High quality embryo rate^b

83 %

72 %

50 %*

25 %*

<0.05

No. of blastocysts^a

8 ± 3

5 ± 2

2 ± 1*

1 ± 1*

<0.05

Blastocyst information rate^b

33 %

28 %

20 %

25 %

NS