Table II. Operators performance: number of procedures, inclusion period, number of ongoing pregnancies (OPs) and unadjusted ongoing pregnancy rate (OPR).

Operator ID	Number of procedures	Date of entry (mm/yyyy)	Date of exit (mm/yyyy)	Number of OPs	OPR % (unadjusted)
01	270	10/2000	11/2004	73	27
02	2996	3/1997	12/2016	672	22.4
03	25	4/2009	10/2010	4	16
04	433	4/2013	12/2016	107	24.7
05	58	4/2013	9/2013	10	17
06	344	9/2013	11/2016	55	16.0
07	25	9/2015	12/2015	2	8
08	284	2/2014	12/2016	53	18.7
09	417	1/2000	4/2006	107	25.7
10	67	1/2005	6/2006	12	18
11	1579	5/2005	12/2016	333	21.1
12	210	3/2005	5/2007	41	19.5
13	56	10/2011	3/2012	14	25
14	1852	10/2003	12/2016	376	20.3
15	20	1/2014	10/2015	3	15
16	996	10/1996	9/2016	221	22.2
17	1871	11/2000	7/2015	440	23.5
18	26	4/2013	6/2013	9	25
19	114	10/2013	11/2016	32	28.1
20	100	4/2011	1/2012	13	13.0
21	74	9/2013	4/2014	13	18
22	780	4/2011	12/2016	140	18.0
23	92	11/2015	12/2016	25	27
24	52	5/2007	10/2007	15	29
25	1855	10/1998	12/2016	394	21.2
26	155	10/2014	12/2016	33	21.3
27	832	7/2008	11/2016	135	16.2
28	162	9/2012	9/2013	35	21.6
29	86	11/2005	9/2006	13	15
30	3367	11/1998	12/2016	739	22.0
31	603	1/2012	11/2016	112	18.6
32	23	8/2014	12/2014	4	17
Total	19 824			4235	21.36