A retrospective comparative study of double cleavage-stage embryo transfer versus single blastocyst in frozen-thawed cycles

Middle East Fertility Society Journal

Table 4 Clinical outcomes after embryo transfer in the day 3 DET and SBT groups

Clinical outcomes	Natural cycles			Modified natural cycles			HRT cycles
Clinical outcomes	DET day 3 (%)	SBT (%)	P value	DET day 3 (%)	SBT (%)	P value	DET day 3 (%)	SBT (%)	P value
Positive pregnancy	53.8	55.8	0.721	60.3	52.6	0.278	60.0	59.8	0.968
Clinical pregnancy	52.8	49.7	0.576	57.4	48.0	0.190	55.0	52.0	0.605
Implantation	34.9	49.7	0.001	40.4	48.6	0.153	38.5	52.0	0.004
Ongoing pregnancy	49.1	41.5	0.178	45.6	35.4	0.144	46.0	45.3	0.907
Multiple pregnancies	23.2	1.4	0.000	33.3	0.0	0.000	30.9	1.5	0.000

DET double embryo transfer, ET embryo transfer, HRT hormone replacement therapy, SBT single blastocyst transfer
Numbers in bold represent statistical significance, p < 0.05, a significant difference between DET day 3 and SBT