Table 1.

Cycle characteristics between donor age subgroups (n = 203)

	Donor age group 1	Donor age group 2	P valueb
	≤25 years (n = 111)	26–30 years (n = 92)
	Median (IQR)a
Gonadotropins administered (IU)	3075 (2700, 3750)	3000 (2375, 3600)	0.18
Peak E2 (pg/ml)	3544 (2437, 4956)	3431 (2569, 4856)	0.95
Number of oocytes retrieved	29 (23, 37)	27 (20, 35)	0.18
Cycle blastocyst formation rate (%)	66.7 (50, 75)	62.5 (52, 75)	0.55
Cycle blastocyst euploid rate (%)	80 (66.7, 87.5)	75 (62.5, 87.5)	0.07

^aInterquartile ranges

^bWilcoxon rank-sum test