Table 1.

Description of the included studies

No	Name of Authors	Year of Publication	Study done	Type of study	SS (n)	PI (%)	SI (%)	MF (n)	FF (n)	CF (n)	UF (n)	Study region
1	Benbella et al. [18]	2018	Morocco	Case series	1265	77	23	NR	NR	NR	NR	North Africa
2	Nwajiaku et al. [19]	2012	Nigeria	Cross-sectional	204	41	59	25	45	20	10	West Africa
3	Gyasi-Sarpong et al. [20]	2017	Ghana	Cross-sectional	110	58	42	15	85	NR	NR	West Africa
4	Sule et al. [21]	2008	Nigeria	Case study	200	23	78	6.5	93.5	NR	NR	West Africa
5	Anyanwu & Idoko [22]	2017	Gambia	Cross-sectional	328	34	59	9	NR	NR	10	West Africa
6	Dattijo et al. [23]	2016	Nigeria	Cross-sectional	406	38	62	11	67	10	12	West Africa
7	Larsen [24]	2006	Tanzania	Cross-sectional	178a	37	63	9	66	13	12	East Africa
8	Ikechebelu et al. [25]	2003	Nigeria	Cross-sectional	314	65	35	42	26	21	11	West Africa
9	Elhussein et al. [26]	2019	Sudan	Cross-sectional	800	69	31	36	43	18	3	North Africa
10	Benksim et al. [27]	2018	Morocco	Cross-sectional	619	67	33	NR	NR	NR	NR	North Africa
11	Abdella [28]	2011	Sudan	Cohort	200	80	21	20	38	31	11	North Africa
12	Inhorn & Buss [8]	1994	Ejypt	Case control	100b	56	44	46	82	NR	6	North Africa
13	Panti & Sununu [29]	2014	Nigeria	Cross-sectional	198	33	67	20	43	17	21	West Africa
14	Obuna et al. [30]	2012	Nigeria	Cross-sectional	266	35	65	23	35	24	18	West Africa
15	Ekwere et al. [31]	2007	Nigeria	Cross-sectional	750	48	51	30	58	12	NR	West Africa
16	Chigumadzi et al. [5]	1998	South Africa	Cross-sectional	100	40	60	NR	NR	NR	3	Southern Africa
17	Kitilla [32]	2000	Ethiopia	Cross-sectional	2503	39	61	NR	NR	NR	NR	East Africa
18	Hailemariam [33]	1999	Ethiopia	Cross-sectional	171	15	85	NR	NR	NR	NR	East Africa
19	Mokhtar et al. [34]	2006	Ejypt	Case control	215	80	20	NR	NR	NR	NR	North Africa
20	Eric et al. [35]	2016	Burkina Faso	Cross-sectional	93	NR	NR	35	43	22	NR	West Africa
21	Dhont et al. [36]	2011	Rwanda	Cohort	224	NR	NR	NR	31	50	3	East Africa

SS Sample size, PI Primary infertility, SI Secondary infertility, MF Male factor, FM Female factor, CF Combined factor, UF Unidentified factor.

^aonly 91 of 178 infertility cases were investigated to identify the factors

^bMF was calculated from 87 of 100 cases.