Table 2.

The clinical PRs with different DAF in cleavage embryos/blastocysts FET cycles.

DAF	Clinical PRs with
	Cleavage embryos		Blastocysts
	n/total n	%	n/total n	%
≤3 mm	7/21	33.3	34/54	62.9
4 mm	9/17	52.9	36/52	69.2
5 mm	20/42	47.6	79/124	63.7
6 mm	26/43	60.4	71/104	68.2
7 mm	13/31	41.9	72/102	70.5
8 mm	21/32	65.6	69/93	74.1
9 mm	18/26	69.2	47/66	71.2
10 mm	18/36	50	30/51	58.8
11 mm	8/19	42.1	28/39	71.7
12 mm	6/11	54.5	23/32	71.8
13 mm	12/17	70.5	23/31	74.1
14 mm	1/3	33.3	7/10	70.0
≥15 mm	5/16	31.2	26/48	55.0

DAF, distance from the air bubble to endometrial cavity fundus.