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Table 3 Summary of embryo transfer and calving of cloned embryos from different cell types

From: Cloning animals by somatic cell nuclear transfer – biological factors

Cell type

No. embryo Transferred

No. recipients

No. (%) calves born

Alive to adulthood

  

Total

Pregnant*

  

Cumulus

109

58

10

6 (5.5)**

4

Fibroblast

57

29

8

4 (7.0)**

0

Epithelium

34

24

1

0

0

  1. *: Pregnancy determined by ultrasound examination at 60 days of gestation. **: A set of twins included.