Table 5. Clinical pregnancy rate, delivery rate and gestational order according to the number of embryos transferred in fresh and cryopreserved oocyte donation cycles in 2015
Number of transferred embryos	Total embryo transfer		Clinical pregnancy rate per embryo transfer (%)	Deliveries
	Number	%		Total (number)	Delivery rate per embryo transfer (%)	Singleton (%)	Twin (%)	≥Triplets (%)
1	1,624	17.09	36.76	442	27.22	97.74	2.26	0.00
2	6,226	65.52	47.64	2,374	38.13	68.53	30.92	0.55
3	1,563	16.45	49.46	650	41.59	62.77	33.54	3.69
≥4	90	0.95	36.67	28	31.11	85.71	14.29	0.00
Total	9,503	100.00	45.97	3,494	36.77	71.29	27.65	1.06