TABLE 4.

Embryo transfer and birth rates by age and residency status, 2006–2013.

Cycles	Age group (y)	Outcome	U.S. residents	Non-U.S. residents
Fresh nondonor cycles	<35	No. of cycles	279,083	2,770
		Average no. of embryos transferred	2.0	2.2
		Percentage with live births	46.8	47.6
		Percentage with multiple live births	15.5	16.0
	35–37	No. of cycles	138,403	1,610
		Average no. of embryos transferred	2.3	2.3
		Percentage with live births	38.0	38.5
		Percentage with multiple live births	10.9	10.9
	38–40	No. of cycles	122,219	1,502
		Average no. of embryos transferred	2.6	2.6
		Percentage with live births	27.9	30.4
		Percentage with multiple live births	6.4	6.3
	41–42	No. of cycles	55,092	645
		Average number of embryos transferred	3.0	2.8
		Percentage with live births	16.3	19.1
		Percentage with multiple live births	2.5	2.5
	>42	No. of cycles	29,842	446
		Average no. of embryos transferred	3.1	2.8
		Percentage with live births	6.6	7.0
		Percentage with multiple live births	0.7	0.9
Fresh donor cycles	All ages	No. of cycles	70,868	5,512
		Average no. of embryos transferred	2.0	2.0
		Percentage with live births	55.2	57.1
		Percentage with multiple live births	20.8	20.8

Note: Average number of embryos transferred, percentage with live births or multiple live births were calculated among all cycles in which embryo transfer was attempted. Age group is based on patient age at cycle start.

Levine. ART use in the U.S. by nonresidents. Fertil Steril 2017.