Table 1 Number of embryos in each stage of development following oocyte thaw and fertilization by ICSI in women aged 40 and older who underwent minimal/mild ovarian stimulation IVF

Completely hatched blastocyst

2

Hatched blastocyst

17

Expanded blastocyst

11

Blastocyst

17

Early blastocyst

1

Cavitating blastocyst

14

Morula

9

Compacted morula

25

14-cell embryo

1

10-cell embryo

1

9-cell embryo

3

8-cell embryo

58

7-cell embryo

13

6-cell embryo

34

5-cell embryo

19

4-cell embryo

48

3-cell embryo

15

2-cell embryo

32

1-cell embryo

18

1 pronuclei

10

2 pronuclei

6

3 pronuclei

17

4 pronuclei

9

Multi-pronuclei

2

Degenerated

103