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The combination matters--distinct impact of lifestyle factors on sperm quality: a study on semen analysis of 1683 patients according to MSOME criteria.

TLDR
Combinations of adverse lifestyle factors could have a detrimental impact on sperm, not only in terms of motility and sperm count but also in Terms of sperm head vacuolization.
Abstract
Background Poor sperm quality can negatively affect embryonic development and IVF outcome. This study is aimed at investigating the influence of various lifestyle factors on semen quality according to MSOME (motile sperm organelle morphology examination) criteria.

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Consistent age-dependent declines in human semen quality: A systematic review and meta-analysis

TL;DR: It is suggested that greater focus on collection of DNA fragmentation and progressive motility in a clinical setting may lead to better patient outcomes during fertility treatments of aging couples, even though sperm concentration did not decline with increasing male age.
Journal ArticleDOI

Semen quality and alcohol intake: a systematic review and meta-analysis

TL;DR: Results showed that alcohol intake has a detrimental effect on semen volume and normal morphology, and studies evaluating the effect of changes on semen parameters on the reproductive outcomes are needed in advance of providing recommendations regarding alcohol intake other than the advice to avoid heavy alcohol drinking.
Journal ArticleDOI

Coffee and caffeine intake and male infertility: a systematic review.

TL;DR: The literature suggests that caffeine intake, possibly through sperm DNA damage, may negatively affect male reproductive function, and well-designed studies are essential to reach a consistent evidence on the effect of caffeine on semen parameters and male fertility.
Journal ArticleDOI

Lifestyles Associated With Human Semen Quality: Results From MARHCS Cohort Study in Chongqing, China.

TL;DR: Smoking, coffee/cola/fried foods consumption, and the effects of environmental/sociopsychobehavioral factors act on semen quality are found to be significantly associated with semen quality from the baseline investigation.
References
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Journal ArticleDOI

Caffeine Intake and Semen Quality in a Population of 2,554 Young Danish Men

TL;DR: The authors cannot exclude the possibility of a threshold above which cola, and possibly caffeine, negatively affects semen quality, and the less healthy lifestyle of these men may explain these findings.
Journal ArticleDOI

Reproductive effects of male psychologic stress.

TL;DR: The results indicate an effect of stress only on fecundability, and this only among men with low sperm concentration, according to a prospective study of 430 Danish couples trying to become pregnant for the first time.
Journal ArticleDOI

Effect of psychological stress on the L-arginine-nitric oxide pathway and semen quality

TL;DR: It is suggested that the arginine-NO pathway, together with arginase and NO synthase, are involved in semen quality under stress conditions, and poor sperm quality may be due to excessive production of NO under psychological stress.
Journal ArticleDOI

The IMSI procedure improves poor embryo development in the same infertile couples with poor semen quality: a comparative prospective randomized study.

TL;DR: The IMSI procedure improved embryo development and the laboratory and clinical outcomes of sperm microinjection in the same infertile couples with male infertility and poor embryo development over the previous ICSI attempts.
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The negative impact of age, BMI and coffee intake on sperm quality could be compensated if patients had a high ejaculation frequency and shorter periods of sexual abstinence. Combinations of adverse lifestyle factors could have a detrimental impact on sperm, not only in terms of motility and sperm count but also in terms of sperm head vacuolization.