. 2020 Jun 6;66(5):427–433. doi: 10.1262/jrd.2020-059

Table 1. In vitro developmental potential of oocytes collected via surgical operation with anesthesia after in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI).

Exp.	Collection method	No. of used mice *	No. of used oocytes	No. of oocytes surviving after ICSI	No. (%) ** of oocytes with 2PN formed	No. of embryos developed to
Exp.	Collection method	No. of used mice *	No. of used oocytes	No. of oocytes surviving after ICSI	No. (%) ** of oocytes with 2PN formed	2 cell	4–8 cell	Morula	Blastocyst (%) **
IVF	Control	17	376	-	353 (93.9) ^a	348	335	325	319 (90.4) ^a
IVF	Operation	42	1022	-	963 (94.2) ^a	939	894	861	852 (88.5) ^a
ICSI	Control	20	286	214	198 (92.5) ^b	192	165	144	130 (65.7) ^b
ICSI	Operation	17	294	218	204 (93.6) ^b	195	175	160	148 (72.5) ^b

Some experimental groups were not performed with control at the same time. PN: Pronuclei. * The data of oocytes collected from these mice were used not only in this table but also in Table 2. ** Identical letters indicate no significant differences by Pearson’s chi-squared test (P > 0.01).