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

Table 3 Clinical outcome after fresh blastocyst and cleavage-stage transfer

	Female age < 35 years		35 years ≤Female age≤39 years
	Cleavage-stage transfer group	Blastocyst transfer group	Cleavage-stage transfer group	Blastocyst transfer group
No. of patients	274	168	52	21
Retrieved oocytes (mean± SD)	7.33±3.57	11.43±4.01^a	6.23±3.68	11.24±4.55^a
No. of embryos transferred (mean± SD)	2.15±0.55	1.75±0.34^a	2.67±0.76	1.76±0.83^a
Clinical pregnancy rate, no. (%)	129/274(47.1)	69/168(41.1)	22/52(42.3)	7/21(33.3)
Implantation rate, no. (%)	184/589(31.2)	97/305(31.8)	30/139(21.6)	8/37(21.6)
Multiple pregnancy rate, no. (%)	53/129(41.1)	28/69(40.6)	7/22(31.8)	1/7(14.3)
Singleton pregnancy rate, no.	76	41	15	6
Twin pregnancy rate, no.	51	27	6	1
Triplets pregnancy rate, no.	2	1	1	0

Note : Values are presented as number, number (%) or mean ± SD.
a:significant difference between cleavage stage and blastocyst transfer in two different age groups (p<0.05).
Clinical pregnancy, implantation, and multiple pregnancy rates all show no significant difference between cleavage stage and blastocyst transfer in two different age groups.

ISSN: 1757-2215