Table 2.

Relevant studies for each of the investigated correlation.

Investigated Relationship	Relevant Studies
Irritable bowel syndrome-Infertility	Rossato et al. [11], Moody et al. [12] Narendranathan et al. [13], Lee et al. [17]
Oxidative stress-Infertility	Sharma et al. [39], Aitken et al. [43] Agarwal et al. [51]
Oxidative stress-Infertility	Mate et al. [64]