Table 1.

Ovulation yields in young and old females of different genetic backgrounds.

	Median (Q1; Q3)Number of analyzed females
	F1		SWISS		C57BL/6
Parameter	Young	Old	Young	Old	Young	Old
No. of ovulated oocytes per female	36.5 (31.75; 45.25) n = 18	1.5  a (0.4; 2.4) n = 198	33.0 (21.0; 45.5) n = 17	3.6  a (2.6; 5.3) n = 49	23.0 (15.0; 33.0) n = 13	1.8  b (1.6; 2.9) n = 66

^a P < 0.001, ^bP < 0.01 vs. oocytes from young females of the respective background.