The effectiveness of different down-regulating protocols on in vitro fertilization-embryo transfer in endometriosis: a meta-analysis

Table 1 Characteristics of the included studies

Included studies	Country	Study type	Protocol (Sample size)			Stage of ASRM
First author /Year	Country	Study type	Ultra-long	Long	Short	Stage of ASRM
Maged 2018 [11]	Egypt	RCT	45	45		Stage III-IV
Decleer 2016 [12]	Belgium	RCT	61	58		Stage I-II
Rickes 2002 [13]	Germany	RCT	45	37		Stage II-IV
Surrey 2002 [14]	American	RCT	25	26		Stage I-IV
Jiang HL 2018 [15]	China	RCT	56	56		Clinical pathology diagnosis
Dai L 2017 [16]	China	RCT	30	30		Laparoscopic or open-abdominal diagnosis
Lin WQ 2004 [17]	China	RCT	26	36		Stage III-IV
Sõritsa 2015 [18]	Estonia	RC	89	53		Stage I-II
Tamura 2014 [19]	Japan	RC	11	12		Stage III-IV
Ma 2008 [20]	China	PC	75	97		Stage III-IV
Nakamura 1992 [21]	Japan	RC	21	11		Stage I-IV
Wang F 2017 [22]	China	RC	102	80		Stage I-II
Du H 2017 [23]	China	RC	42	38	40	Stage III-IV
Jiang YH 2016 [24]	China	RC	30	58	38	Stage III-IV
Zhang QF 2015 [25]	China	RC	25	119	21	Stage I-II
Song N 2014 [26]	China	RC	75	33		Stage III-IV
Deng HL 2012 [27]	China	RC	74	177		Stage I-IV
Sun YL 2012 [28]	China	RC	132	74	56	Stage I-IV
Niu HY 2011 [29]	China	RC	25	25		Stage III-IV
Cheng D 2010 [30]	China	RC	23	67	49	Stage III-IV
Wang L 2009 [31]	China	RC	42	40		Stage III-IV

PC prospective cohort, RC retrospective cohort, RCT randomized controlled trial

ISSN: 1477-7827