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Table 3 Summary table of the data from included studies showing the pooled prevalence of the causes of male and female infertility using the random effect model

From: Primary and secondary infertility in Africa: systematic review with meta-analysis

Causes of male infertilitya Number of studies/SS Pooled prevalence % Causes of female infertility Number of studies /SS Pooled prevalence %
Oligospermia 10 (2486) 31 Tubal factor 12 (2767) 39.17
Asthenozoospermia 7 (1522) 19.39 Ovulatory disfunction 10 (2528) 31.47
Azoospermia 10 (2486) 14.24 Uterine factor 12 (2886) 18.55
Varicoceles 6 (2435) 19.12 PID 5 (1136) 39.83
Cryptorchidism 4 (1506) 8.9 Endometriosis 5 (1041) 1.65
Teratozoospermia 4 (1435) 7.77 Abortion 3 (502) 36.41
Oligo-asthenozoospermia 3 (1285) 15.12 Cervical factor 3 (395) 27.45
    Puerperal sepsis 3 (502) 19.14
  1. PID pelvic inflammatory disease, SS sample size
  2. aFor the causes of male infertility, the aforementioned terms in the table are based on the following definitions. Oligospermia is a condition when the number of spermatozoa is less than 15 million per a milliliter of semen. Azoospermia is a name given for the total absence of sperm cells in semen. When progressively motile sperm cells are less than 32% or total motility is less than 40%, it is named as asthenozoospermia. If the number of a sperm cell with abnormal morphology is greater than 4%, it is teratozoospermia. In case when oligospermia and asthenozoospermia found simultaneously the name will be oligo-asthenozoospermia
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