Table 1.

Baseline and cycle characteristics of patients randomised to different catheters.

Patient characteristics	Cook (n = 723)	Frydman (n = 723)
Age (yr)	32.2 (4.4)	31.2 (2.9)
Primary infertility (%)	455 (62.93)	444 (61.41)
No. of oocytes retrieved (mean, SD)	13.4 (7.8)	13.4 (7.1)
Transfer of one embryo (%)	234 (32.4)	248 (34.3)
Transfer of two embryos (%)	413 (57.1)	395 (54.6)
Transfer of three embryos (%)	76 (10.5)	80 (11.1)
Transfer on day 2 (%)	472 (65.3)	481 (66.5)
Transfer on day 3 (%)	251 (34.7)	242 (33.5)