Table 1.

Summary of research articles included in this systemic review and meta-analysis of infertility (n=32)

No	Authors	Study area	Study design	Sample size	Female infertility	Quality assessment (%)
1	Aggarwal et al, 201336	India	Cross-sectional	500	267	87.5
2	Albayrak and Günay, 200723	Kayseri, Turkey	Cross-sectional	300	150	87.5
3	Biringer et al, 201533	North Trondelag, Sweden	Cross-sectional	12 584	1696	100
4	Klemetti et al, 20109	Finlad	Cross-sectional	2291	239	100
5	Bakhtiyar et al, 201918	Lorestan, Iran	Case control	720	180	70
6	Alhassan et al, 201440	Ghana	Cross-sectional	100	100	87.5
7	Alosaimi et al, 201542	Riyadh, Saudi Arabia	Cross-sectional	406	206	100
8	Matsubaya et al, 200143	Tokai, Japan	Cross-sectional	182	101	87.5
9	Açmaz et al, 201324	Kayseri, Turkey	Cross-sectional	133	86	87.5
10	Bai et al, 201944	Ningxia province, China	Cross-sectional	740	380	100
11	Bazarganipour et al, 201319	Kashan, Iran	Cross-sectional	300	238	100
12	Begum and Hasan, 201446	Karachi, Pakistan	Cross-sectional	120	60	87.5
13	Volgsten et al, 200835	Sweden	Cross-sectional	825	122	88.9
14	Bringhenti et al, 199727	Italy	Cross-sectional	179	122	87.5
15	Lansakara and Wickramasinghe, 201137	Colombo, Sri Lanka	Cross-sectional	354	177	87.5
16	Noorbala et al, 200920	Tehran, Iran	Cross-sectional	300	150	87.5
17	Salih Joelsson et al, 201734	Sweden	Cross-sectional	3583	468	100
18	Aydin et al, 201525	Istanbul, Turkey	Cross-sectional	88	88	87.5
19	Tarlatzis et al, 199347	Greece	Cohort	87	69	81.8
20	Ramezan et al, 200421	Tehran, Iran	Cross-sectional	370	370	87.5
21	Aarts et al, 201138	Netherlands	Cross-sectional	472	472	87.5
22	Baldur et al, 201339	Denmark	Cohort	98 320	44 773	100
23	Diamond et al, 201731	United states	Cross-sectional	1594	1594	87.5
24	Downey and McKinney, 199230	New York City	Case control	201	118	80
25	Fassino et al, 200228	Italy	Case control	172	172	90
26	Guz et al, 200326	Turkey	Case control	100	50	80
27	Omani et al, 201722	Tehran, Iran	Cross-sectional	312	149	100
28	Salomão et al, 201832	Brazil	Case control	280	140	80
29	Sbaragli et al, 200829	Siena, Italy	Case control	302	82	100
30	Akalewold et al, 202241	Ethiopia	Cross-sectional	409	66	100
31	Kleanthi et al, 202148	Greece	Case control	177		90
32	Peng et al, 202145	China	Case control	450		100

The quality assessment was performed based on the Joanna Briggs Institute Meta-Analysis for cross-sectional, case–control and cohort studies.