Table 1. The efficiency of embryo fused by SCNT using in vitro or in vivo matured oocytes

Group¹⁾	No. of oocyte donor dogs	No. of oocytes	No. of embryos		Fusion rate (%)²⁾
Group¹⁾	No. of oocyte donor dogs	No. of oocytes	Injected	Fused	Fusion rate (%)²⁾
In vivo	15	164	116	85	73.28
In vitro	2	20	17	14	82.35

In vivo, nuclear matured oocytes with 1^st polar body retrieved from oocyte donor dog; In vitro, in vitro mature oocytes obtained by culturing immature oocytes without 1st polar body retrieved from oocyte donor dogs in IVM medium supplemented with hormone combination for 24 h.
Percentage calculated from number of injected oocytes.
SCNT, somatic cell nuclear transfer.