. Author manuscript; available in PMC: 2015 Feb 1.

Published in final edited form as: Genet Med. 2013 Aug 8;16(2):164–169. doi: 10.1038/gim.2013.97

Table 2.

Number and percentage of ART-conceived participants with PWS from each studied group with each ART procedure.

Type of ART	PWSA (USA)		RDCRN		UCIMC		Total

	N	(%)	N	(%)	N	(%)	N	(%)
IVF Variations
IVF only	9	(50.0)	0	(0)	1	(100)	10	(50.0)
IVF/ICSI	3	(16.7)	0	(0)	0	(0)	3	(15.0)
IVF/Donor Egg	5	(27.8)	1	(100)	0	(0)	6	(30.0)
ZIFT	1	(5.5)	0	(0)	0	(0)	1	(5.0)
Total	18	(100)	1	(100)	1	(100)	20	(100)

key: ivf= in vitro fertilization, icsi= intracytoplasmic sperm injection, zift= zygote intrafallopian transfer