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Table 1 Obtained developmental stages of the grass snake and the numbers of isolated embryos, performed sets of serial section and 3D reconstructions

From: Embryology of the VNO and associated structures in the grass snake Natrix natrix (Squamata: Natricinae): a 3D perspective

Days post oviposition (d.p.o.)

Developmental stage

No of isolated embryos (viable)

No of sets of serial sections

No of 3D reconstructions

2–3

II

2

2

1

5–6

IV

4

4

2

8

V

4

4

1

10–13

VI

5

4

1

18

VIII

5

5

1

24

X

2

1

0

27–28

XI

5

4

1

Total

 

27

24

7