. 2014 Apr 2;9(4):e93446. doi: 10.1371/journal.pone.0093446

Table 4. Activation rates after mouse or rat oocytes collected 19(mouse) or mRECM (rat) medium supplemented with different concentrations of NaCl.

NaCl (mM)	Mouse		Rat
	Oocytes observed	% Oocytes activated	Oocytes observed	% Oocytes activated
0	131	45.2±4.3^a	123	69.1±2.3^a
25	130	44.4±3.7^a	-	-
50	134	49.3±2.7^a	130	21.1±1.8^b
75	135	21.9±4.7^b	-	-

a–b: Values with a common letter in their superscripts do not differ (P>0.05) in the same column. While rat oocytes were examined for spontaneous activation immediately after culture, mouse oocytes were treated with 5% ethanol for 10 min after culture and observed for activation 6 h later.