Table 1. Summary of blastocysts divided among experimental procedures.

Experiment	Embryos	Number of Blastocysts	Number of Patients	Mean Maternal Age	Mean Paternal Age
	Controls	35	13	Donor, <33	39.7 ± 5.2
Imprinted	Trisomy 15	20	20	39.5 ± 3.8	40.0 ± 6.5
DNA	Trisomy 11	20	20	38.7 ± 4.0	39.9 ± 4.4
Methylation	Monosomy 15	20	20	38.3 ± 4.4	37.2 ± 4.3
	Monosomy 11	25	25	39.0 ± 3.0	39.7 ± 4.6
	Controls	10	2	Donor, <33	39.8 ± 1.5
Imprinted	Trisomy 15	10	10	40.5 ± 2.1	41.8 ± 5.5
Gene	Trisomy 11	10	10	37.1 ± 4.4	39.7 ± 6.5
Expression	Monosomy 15	10	10	41.2 ± 2.3	44.8 ± 5.6
	Monosomy 11	10	10	40.9 ± 1.2	42.8 ± 3.2