Table 1.

Effect of mouse reproductive age on the ovary in response to gonadotropin stimulation (5 replicates)

Mouse age (weeks)	No. of mice examined	No. of oocytes retrieved	No. (mean) of oocytes from each mouse	95% confidence interval (CI)
8–10	18	483	26.8 ± 9.8a	21.9∼31.7
16–20	14	335	23.9 ± 4.3a	21.4∼26.4
32–36	17	309	18.1 ± 8.5b	13.7∼22.5
44–48	27	256	8.7 ± 4.0c	4.5∼10.1

^a–cDifferent superscripts indicate significant difference (P < 0.05)