Table 6. Clinical pregnancy rate, delivery rate and gestational order according to the number of embryos transferred in frozen embryo transfer cycles in 2016
Number of transferred embryos	Total embryo transfer		Clinical pregnancy		Deliveries
	Number	%	Number	%	Numbe of deliveries	Delivery rater per embryo transfer (%)	Singleton (n)	Singleton (%)	Twin (n)	Twin (%)	≥ Triplets (n)	≥ Triplets (%)
1	6,082	31.02	1,884	30.98	1,276	20.98	1,239	97.10	37	2.90	0	0.00
2	11628	59.30	4462	38.37	3246	27.,92	2487	76.62	742	22.86	17	0.52
3	1793	9.14	605	33.74	448	24.99	333	74.33	100	22.32	15	3.35
≥4	105	0.54	31	29.52	23	21.90	19	82.61	4	17.39	0	0.00
Total	19608	100	6982	35.61	4993	25.46	4078	81.67	883	17.68	32	0.,64