Research Article

Theoretical Model of the Relationship between Single Embryo Transfer Rate and Multiple Pregnancy Rate in Japan

Table 1

SET pregnancy rate, multiple pregnancy rate, non-SET multiple pregnancy rate, and total pregnancy rate according to the ART type.

SET pregnancy rateMultiple pregnancy rateNon-SET multiple pregnancy rateTotal pregnancy rate per implantation

200741.3 (3,017/7,313)12.7 (926/7,313)21.6 (926/4,296)26.4 (7,313/27,729)
ā€‰IVF-ET200860.0 (4,082/6,808)7.5 (513/6,808)18.8 (513/2,726)23.8 (6,808/28,609)
Fresh200969.3 (4,725/6,818)5.8 (397/6,818)19.0 (397/2,093)24.3 (6,818/28,075)
200739.3 (2,585/6,577)11.3 (746/6,577)18.7 (746/3,992)22.1 (6,577/29,768)
ICSI200855.8 (3,314/5,934)7.2 (425/5,934)16.2 (425/2,620)19.9 (5,934/29,831)
200963.4 (3,921/6,186)5.7 (354/6,186)15.6 (354/2,265)20.2 (6,186/30,604)

200755.7 (7,757/13,932)9.9 (1,376/13,932)22.3 (1,376/6,175)32.1 (13,932/43,452)
Frozen200871.0 (12,913/18,194)6.0 (1,086/18,194)20.6 (1,086/5,281)32.2 (18,194/56,494)
200976.7 (17,500/22,813)4.7 (1,079/22,813)20.3 (1,079/5,313)32.6 (22,813/69,979)

200747.5 (13,865/29,165)11.0 (3,221/29,165)21.1 (3,221/15,300)27.6 (29,165/105,849)
Total200865.3 (21,232/32,511)6.6 (2,139/32,511)19.0 (2,139/11,279)26.8 (32,511/121,395)
200973.0 (27,330/37,437)5.1 (1,917/37,437)19.0 (1,917/10,107)27.7 (37,437/135,093)

SET: single-embryo transfer.
ART: assisted reproductive technology.
IVF-ET: in vitro fertilization and embryo transfer.
ICSI: intracytoplasmic sperm injection.
For definitions of rates, see the text.