Clinical outcome of fresh and vitrified-warmed blastocyst and cleavage-stage embryo transfers in ethnic Chinese ART patients

Table 2 Patient characteristics for blastocyst and cleavage-stage transfer: Jan 2009 ~ Jul 2010 (age between 35 to 39 years)

	Cleavage-stage transfer group	Blastocyst transfer group
Number of patients	52	21
Female patient age (y, mean± SD)	36.69±1.45	37.05±1.32
Duration of infertility (y, mean± SD)	5.85±3.31	6.45±3.20
Body mass index (w, mean± SD)	22.14±2.07	22.84±2.47
ICSI cycles, no. of patients (%)	12(23.1)	5(23.8)
Tubal factor, no. of patients (%)	33(63.5)	10(47.6)
Male factor, no. of patients (%)	4(7.7)	4(19.0)
Tubal and male factor, no of patients (%)	13(25)	5(23.8)
Multiple factors, no. of patients (%)	2(3.8)	2(9.5)

Note: Values are presented as number, number (%) or mean ± SD.
ICSI: intracytoplasmic sperm injection.
Female patient age, duration of infertility, body mass index, percentage of ICSI cycles and percentage of different infertility factors were all not significantly different between the cleavage-stage and blastocyst transfer groups.

ISSN: 1757-2215