Vitamin D deficiency and low ionized calcium are linked with semen quality and sex steroid levels in infertile men.
Martin Blomberg Jensen,Martin Blomberg Jensen,Jacob Gerner Lawaetz,Anna-Maria Andersson,Jørgen Holm Petersen,Loa Nordkap,Anne Kirstine Bang,Pia Ekbom,Ulla Nordström Joensen,Lisbeth Prætorius,Peter Lundstrøm,Vibeke Hartvig Boujida,Beate Lanske,Anders Juul,Niels Jørgensen +14 more
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The associations between vitamin D deficiency and low calcium with semen quality and sex steroids support the existence of a cross-link between regulators of calcium homeostasis and gonadal function in infertile men.Abstract:
STUDY QUESTION Are low vitamin D levels linked with semen quality and sex steroids in infertile men? SUMMARY ANSWER Infertile men with vitamin D deficiency had lower sperm motility, total numbers of motile sperm, Inhibin B, sex-hormone-binding-globulin (SHBG) and testosterone/estradiol ratio, but higher levels of free sex steroids, than infertile men with normal vitamin D levels. WHAT IS KNOWN ALREADY Low vitamin D levels have been associated with decreased sperm motility in healthy men, but a relationship between vitamin D and calcium with semen quality and especially sex steroids has not been sufficiently described in infertile men. STUDY DESIGN, SIZE, DURATION This study comprises baseline characteristics of 1427 infertile men screened from 2011 to 2014 for inclusion in a randomized clinical trial, the Copenhagen-Bone-Gonadal Study. PARTICIPANTS/MATERIALS, SETTING, METHODS In total 1427 infertile men, consecutively referred to our tertiary andrological centre for fertility workup, underwent a physical examination and had semen quality assessed based on two samples and blood analysed for serum testosterone, SHBG, estradiol, inhibin B, luteinizing hormone, follicle-stimulating hormone (FSH), 25-hydroxyvitamin D (25-OHD), ionized calcium (Ca(2+)) and karyotype. There were 179 men excluded due to serious comorbidities or anabolic steroid usage, leaving 1248 patients for analyses. MAIN RESULTS AND THE ROLE OF CHANCE Men with 25-OHD >75 nmol/l had higher sperm motility and 66 and 111% higher total numbers of motile spermatozoa after 45 and 262 min, respectively, than men with 25-OHD <25 nmol/l (all P < 0.05). SHBG levels and testosterone/estradiol ratios were 15 and 14% lower, respectively, while free testosterone and estradiol ratios were 6 and 13% higher, respectively, in men with 25-OHD <25 nmol/l (all P < 0.05). Men with lower Ca(2+) levels had higher progressive sperm motility and inhibin B/FSH ratio but lower testosterone/estradiol ratio (all P < 0.05). LIMITATIONS, REASONS FOR CAUTION All outcomes presented are predefined end-points but inferral of causality is compromised by the descriptive study design. It remains to be shown whether the links between vitamin D, calcium, semen quality and sex steroids in infertile men are causal. WIDER IMPLICATIONS OF THE FINDINGS The associations between vitamin D deficiency and low calcium with semen quality and sex steroids support the existence of a cross-link between regulators of calcium homeostasis and gonadal function in infertile men. STUDY FUNDING/COMPETING INTERESTS This study was supported by the Danish Agency for Science, Technology and Innovation, Horslev Fonden, Danish Cancer Society and Novo Nordisk Foundation. There are no conflicts of interest. TRIAL REGISTRATION NUMBER NCT01304927. DATE OF TRIAL REGISTRATION 25 February 2011. DATE OF ENROLMENT OF FIRST PATIENT 8 March 2011.read more
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آنتیاکسیدانها برای کمباروری مردان
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Effects of Vitamin D Supplementation on Semen Quality, Reproductive Hormones, and Live Birth Rate: A Randomized Clinical Trial.
Martin Blomberg Jensen,Martin Blomberg Jensen,Jacob Gerner Lawaetz,Jørgen Holm Petersen,Anders Juul,Niels Jørgensen +5 more
TL;DR: The positive impact of vitamin D supplementation on live birth rate and serum inhibin B in oligozoospermic and vitamin D-deficient men may be of clinical importance and warrant verification by others.
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The role of vitamin D in male fertility: A focus on the testis
Cristina de Angelis,Mariano Galdiero,Claudia Pivonello,Francesco Garifalos,Davide Menafra,Federica Cariati,Ciro Salzano,Giacomo Galdiero,Mariangela Piscopo,Alfonso Vece,Annamaria Colao,Rosario Pivonello +11 more
TL;DR: Clinical and experimental studies in humans and animals addressing the relationship between vitamin D and testis function and vitamin D was shown to be positively associated to sperm motility, and to exert direct actions on spermatozoa, including non-genomic driven modulation of intracellular calcium homeostasis.
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An overview on role of some trace elements in human reproductive health, sperm function and fertilization process
Mahdiyeh Mirnamniha,Fereshteh Faroughi,Eisa Tahmasbpour,Pirooz Ebrahimi,Asghar Beigi Harchegani +4 more
TL;DR: Human semen contains several trace elements which are necessary for reproductive health, normal spermatogenesis, sperm maturation, motility and capacitation, as well as normal sperm function, and measurement of these trace elements in men with idiopathic infertility is necessary.
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Possible influence of vitamin D on male reproduction.
Ida Marie Boisen,Lasse Bøllehuus Hansen,Li Juel Mortensen,Beate Lanske,Anders Juul,Martin Blomberg Jensen,Martin Blomberg Jensen +6 more
TL;DR: It is plausible that the influence of vitamin D on gonadal function may be mediated indirectly through other vitamin D regulated endocrine factors, including insulin, aromatase, and osteocalcin.
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