In vitro matured oocytes have a higher developmental potential than in vivo matured oocytes after hormonal ovarian stimulation in Callithrix jacchus

Table 2 Total embryo outcome per experiment for different study groups

	In vivo matured oocytes				in vitro matured oocytes
	FSH + hCG		FSH-priming		FSH + hCG		FSH-priming
Total matured oocytes, n	77		20		142		195
Rate and total numbers of 2-cell embryos from matured oocytes	18% (14/77)		0% (0/20)		49% (70/142)		44% (86/195)
Rate and total numbers of 8-cell embryos from matured oocyte	6% (5/77)		0% (0/20)		21% (30/142)		28% (54/195)
Total experiments, n	20		6^a		20		18
Operation type	OPU	OvH	OPU	OvH	OPU	OvH	OPU	OvH
Number of experiments by operation type (OPU/OvH)	16	4	4^a	2^a	16	4	12	6
Number of 8-cell embryos per experiment	0.3	0.3	0	0	1.4	1.8	2.0	5.0

^aIn vivo matured oocytes were used for IVF and further culture only in 6 out of 18 FSH-priming experiments, as IVF attempts were terminated for the MII subgroup once it had become obvious that these oocytes are not developmentally competent

ISSN: 1757-2215