Semen quality as affected by olive oil

Abstract

Various studies have investigated the effects of olive oil on semen quality and sperm physiology. This review systematically discusses and summarises the link between olive oil and semen quality. To achieve this contribution, we searched the PubMed, Scopus, Web of Science, and Google scholar databases for articles and reports published in English (as full articles or abstract only) from September 1975 through February 2017 using the key words "olive oil" and "sperm". Certain interrelated articles were also considered. In summary, olive oil appears to preserve semen quality in in vivo systems. This result seems to be applicable in humans, but requires additional confirmation in clinical trials. Meanwhile adding olive oil to seminal fluid in vitro seems not to be favorable to sperm parameters. The mechanisms by which olive oil preserves semen quality are through enhancing gonadal function, reducing the level of oxidative injury and lipid peroxidation, and improving nitric oxide signaling.

Reactive oxygen species-induced alterations in H19-Igf2 methylation patterns, seminal plasma metabolites, and semen quality

“…Low SP levels of tyrosine, the precursor of thyroid hormones, were found to be associated with sperm maturation, acrosome reaction, and infertility [72][73][74][75]. Also, tyrosol has been associated with normal sperm physiology [76,77] and DNA integrity [78]. In general, our findings are in line with several studies that demonstrated the potential role of SP constituents in male infertility [65,66,[79][80][81].…”

Relief of the negative effects of heat stress on semen quality, reproductive efficiency and oxidative capacity of rabbit bucks using different natural antioxidants

“…In addition, olive oil contains omega-3 polyunsaturated fatty acids [12] and has beneficial bioactive components (flavonoids and polyphenols) as bioactive organic molecules. These compounds have antimicrobial, antioxidant and anti-inflammatory properties [13]. The antioxidant status in the testes of rat were improved in term of increased TAC and decreased MDA level by olive leaves extract [12].…”

“…It has beneficial bioactive components such as flavonoids (luteolin and apigenin), polyphenols (oleuropein, hydroxytyrosol and tyrosol) and squalene, as bioactive organic molecules. These compounds have antimicrobial, antioxidant and anti-inflammatory properties [13].…”

Effect of inclusion irradiated olive pulp in laying quail diets on biological performance

“…The data clearly showed the highest significant (P ≤ 0.05) increase in fertility, hatching% and hatching weight in laying quail fed IOP up to 60 g/kg diet as compared to control. The significant effect of IOP diets on above mentioned parameters may be attributed to the rich of IOP with olive oil 6.8% Afsari et al (2014), which contains several potent bioactive compounds such as various natural antioxidants (oleuropein and tyrosol), tocopherol (Vitamin E), These compounds have been directly and indirectly linked to reproductive capability, as such interrelated with semen quality and sperm function through enhancing gonadal physiology, and thus increased reproductive performance (Banihani, 2017;Rafehi et al, 2012). In addition, utilization of IOP in laying Japanese quail nutrition enriched the eggs with unsaturated fatty acids and improved the egg quality (Abd El-Samee & Hashish, 2007), resulted in lower embryonic mortality level, higher hatching weight and hatching percentage.…”