Seasonal variation of human semen parameters: A retrospective study in Italy

Giorgi, Alfredo De; Volpi, Reinaldo dos Santos; Tiseo, Ruana; Pala, Marco; Manfredini, Roberto; Fabbian, Fabio

doi:10.3109/07420528.2015.1024315

Cited by 27 publications

(23 citation statements)

References 46 publications

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“…Several studies have been conducted to identify seasonal effects on semen parameters (Andolz, Bielsa, & Andolz, 2001;De Giorgi et al, 2015;Levine et al, 1988;Levitas et al, 2013;Ombelet et al, 1996;Santi et al, 2018;Zhang et al, 2013). In the current…”

Section: Discussionmentioning

confidence: 99%

Do seasonal variations in ambient temperature, humidity and daylight duration affect semen parameters? A retrospective analysis over eight years

et al. 2020

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Natural life depends on biological rhythms that enable living creatures to thrive and survive. Biological rhythms or clocks allow species to adapt their physiological functions to external environmental changes. The environmental changes, creating a complex circadian (day) and circannual (year) rhythmicity, affect the whole organism, particularly the endocrine glands and the gonads. The hypothalamic-pituitary-gonadal axis is extremely susceptible to circannual rhythmicity, regulating the hormone levels (Santi et al., 2020). One of the most critical functions of annual hormone changes in nature is the optimisation of reproduction timing, thereby ensuring the highest survival chances of the offspring (Henkel et al., 2006; Roenneberg & Aschoff, 1990). Unlike other animal species, humans do not necessitate to set a season of fertility and can reproduce throughout the entire year. Although the human is not normally considered a seasonal breeder, many reports demonstrated the seasonal changes in gonadotropins, gonadal hormones and melatonin

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Section: Discussionmentioning

confidence: 99%

Do seasonal variations in ambient temperature, humidity and daylight duration affect semen parameters? A retrospective analysis over eight years

et al. 2020

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“…Melatonin levels are low during the day and high during winter, when the day length is short. Abnormally high melatonin levels characterise males with hypogonadism (De Giorgi et al, ), as well as those with oligospermia or azoospermia (Ozelci et al, ). We propose that seasonally varying melatonin levels have an effect on sperm retrieval in patients with NOA scheduled to undergo mTESE.…”

Section: Discussionmentioning

confidence: 99%

Effect of seasonal variation on the success of micro-dissection testicular sperm extraction: A pilot study

Yücel¹,

Kozacıoğlu²

2018

Andrologia

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| INTRODUC TI ONIn intracytoplasmic sperm injection (ICSI), use of the sperm obtained through micro-dissection testicular sperm extraction (mTESE) enables patients with non-obstructive azoospermia (NOA) to have a biological child (Turunc et al., 2010). According to the literature, the rate of sperm retrieval in patients with NOA undergoing mTESE is around 50% (Vloeberghs et al., 2015). The success of the operation depends on many factors (Yucel et al., 2017), including seasonal variations in numerous physical and psychological factors, including reproduction. This, in turn, has drawn attention to the relationship between seasonal variation and sperm quality. Both temperature and photoperiod were shown to impact sperm quality (Ozelci et al., 2016). An elevation of testicular temperature hinders spermatozoa production by impairing DNA repair mechanisms (Rao et al., 2016;Zhang et al., 2013), whereas the photo-period regulates melatonin levels and thus fertility (Künzle, Mueller, Huber, Drescher, & Bersinger, 2004). Hence, seasonal variation may be considered to affect the sperm retrieval rate. Although many factors affecting the success of mTESE have been investigated, to our knowledge, there are no published studies under the influence of seasonal variation on the success of this procedure. Thus, the aim of this study was to investigate the relationship between seasonal variations and the success of mTESE. Our results will contribute to improving the sperm retrieval rate of mTESE. | MATERIAL S AND ME THODS | Patients and study designThe medical data of 497 consecutive patients diagnosed with NOA, and who subsequently underwent mTESE at our institution between AbstractThe aim of this study is to investigate the relationship between seasonal variation and the success of micro-dissection testicular sperm extraction (mTESE). A total of 395 patients who were diagnosed with non-obstructive azoospermia, who had undergone mTESE operation for the first time, and who did not have an obstructive pathology, were included in the study. The patients were divided into 12 groups according to the month of the operation and four groups according to the season. The groups were compared with regard to age, duration of infertility, BMI, hormone profile and sperm retrieval rate of mTESE. The maximum sperm retrieval rate was obtained in January (69.7%) and the minimum sperm retrieval rate was obtained in November (50.0%). No statistically significant difference was detected when the mTESE results were compared with regard to months (p = 0.638). The maximum sperm retrieval rate was obtained in the summer (62.8%) and the minimum was obtained in spring (57.0%). No statistically significant difference was determined between groups created according to seasons (p = 0.865). We did not observe a statistically significant relationship between the sperm retrieval rate and the seasons. Studies conducted in regions with different climate features could better reveal the relationship between seasonal variation and the success of mTESE. K E Y W O R D...

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“…Это можно рассматривать как еще одно подтверждение рекомендованной профессиональными сообществами практики вынесения заключения о наличии патозооспермии после оценки по крайней мере двух спермограмм, выполненных согласно методическим указаниям ВОЗ [5]. В нашей работе, в отличие от большинства других, в которых был сделан аналогичный анализ [14][15][16][17], были выявлены достоверные различия объема эякулята доноров, полученного в разные сезоны года. Об этом ранее писали A. Reinberg et al [18] и R. Ozelci et al [19], однако наши данные и данные вышеупомянутых авторов не совпали: наименьшие значения объема эякулята обследованных мужчин они наблюдали в летние и весенние месяцы соответственно, в то время как по результатам нашего исследования минимум пришелся на декабрь и январь.…”

Section: Discussionunclassified

“…Это согласуется с данными J. Gyllenborg et al [12], D. Mortimerи et al [26] и M. Xie et al [27], но противоречит выводам других специалистов, проводивших аналогичные исследования и заметивших повышение [11] или, наоборот, снижение [24] этих показателей одновременно с сезонным увеличением концентрации сперматозоидов в эякуляте. Столь же противоречивыми оказались и выводы авторов, анализировавших сезонные колебания доли и числа сперматозоидов, имеющих нормальную морфологию [15][16][17].…”

Section: Discussionunclassified

Analysis of seasonal variability of sperm donors’ semen parameters

Korneyev¹,

Zasseev²,

Pashina³

et al. 2018

Urolog vedom

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Introduction. The concept of seasonal variability of sperm parameters is controversial. However, it should be considered during medical evaluation and solicitation of sperm donors. Aim. To evaluate seasonal variability of sperm parameters from anonymous sperm donors in a reproductive medicine center. Materials and methods. A retrospective study of 1252 semen samples from 39 sperm donors (mean age 27.1 ± 3.9 years) in a reproductive medicine center in Saint Petersburg during the period from October 1, 2015 to October 1, 2017 was performed according to WHO 2010 recommendations. Semen volume, sperm concentration, total sperm number, progressive motility, and number of progressively motile sperm were analyzed. Results. Individual variability in semen parameters was high. The mean ejaculate volume in the summer months was higher than in the autumn, winter, and spring (t = 3.65, p < 0.001; t = 4.18, p < 0.0001; t = 1.92, p = 0.056 respectively). The lowest volume (2.83 ± 1.32 ml) was registered in January. The mean sperm concentration in summer was lower than in autumn, winter, and spring (t = 3.65, p < 0.001; t = 4.18, p < 0.0001; t = 1.92, p = 0.056 respectively). It was higher in winter than in spring and autumn (t = 2.54, p = 0.012; t = 1.72, p = 0.082 respectively). The highest mean sperm concentration was registered in January and the lowest in July (157.2 ± 46.6 and 131.9 ± 44.0 million sperm per ml, respectively). No significant seasonal differences were found in total sperm number, progressive motility, or number of progressively motile sperm (p > 0.1). Conclusions. The study suggests there is both individual and seasonal variability in sperm donors’ semen parameters. As several semen samples are needed to rate semen quality, we recommend that semen analysis for a potential sperm donor be performed in the summer months.

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Seasonal variation of human semen parameters: A retrospective study in Italy

Abstract: This study suggests the existence of a positive relationship between some semen parameters and seasons.

Cited by 27 publications

References 46 publications

Do seasonal variations in ambient temperature, humidity and daylight duration affect semen parameters? A retrospective analysis over eight years

Do seasonal variations in ambient temperature, humidity and daylight duration affect semen parameters? A retrospective analysis over eight years

Effect of seasonal variation on the success of micro-dissection testicular sperm extraction: A pilot study

Analysis of seasonal variability of sperm donors’ semen parameters

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