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vitamin d and infertility

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https://www.readbyqxmd.com/read/27795706/inositol-treatment-and-art-outcomes-in-women-with-pcos
#1
REVIEW
Deepika Garg, Reshef Tal
Polycystic ovary syndrome (PCOS) affects 5-10% of women in reproductive age and is characterized by oligo/amenorrhea, androgen excess, insulin resistance, and typical polycystic ovarian morphology. It is the most common cause of infertility secondary to ovulatory dysfunction. The underlying etiology is still unknown but is believed to be multifactorial. Insulin-sensitizing compounds such as inositol, a B-complex vitamin, and its stereoisomers (myo-inositol and D-chiro-inositol) have been studied as an effective treatment of PCOS...
2016: International Journal of Endocrinology
https://www.readbyqxmd.com/read/27792863/association-of-vitamin-d-status-with-semen-quality-and-reproductive-hormones-in-iranian-subfertile-men
#2
Sh Abbasihormozi, A Kouhkan, A R Alizadeh, A Shahverdi, M H Nasr-Esfahani, M A Sadighi Gilani, R Salman Yazdi, A Matinibehzad, Z Zolfaghari
Although vitamin D deficiency is one of the most common health problems throughout the world, including Iran, conflicting information exists on the potential association between serum vitamin D levels and semen quality. This study intended to evaluate the association between serum vitamin D [25(OH) D3] with semen quality and hormones in Iranian subfertile men. We also compared mean vitamin D and hormone levels in normospermic men with oligoasthenoteratozoospermia (OAT) men. This cross-sectional study was conducted on 278 men who were referred to Royan Infertility Clinic (Tehran, Iran) from March to September 2014...
October 28, 2016: Andrology
https://www.readbyqxmd.com/read/27737331/highly-prevalence-of-vitamin-d-deficiency-among-brazilian-women-of-reproductive-age
#3
Vinicius Medina Lopes, Joaquim Roberto Costa Lopes, Jean Pierre Barguil Brasileiro, Ingrid de Oliveira, Ricardo Peclat Lacerda, Marcos Renato Dib Andrade, Natália Ivet Zavattiero Tierno, Roberto Costa Cavalcante de Souza, Luiz Augusto Casulari Roxo da Motta
Objective: Vitamin D has several metabolic functions and possible reproductive functions. This study aimed to determine the prevalence of vitamin D deficiency among Brazilian women of reproductive age, and to evaluate the relationship between serum 25-hydroxyvitamin D [25(OH)D] concentrations and infertility causes. Subjects and methods: This retrospective cross-sectional study evaluated data from a private Brazilian assisted reproduction center that were collected between January 1 and May 5, 2012...
October 10, 2016: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27693423/possible-influence-of-vitamin-d-on-male-reproduction
#4
Ida Marie Boisen, Lasse Bøllehuus Hansen, Li Juel Mortensen, Beate Lanske, Anders Juul, Martin Blomberg Jensen
Vitamin D is a versatile signaling molecule with an established role in the regulation of calcium homeostasis and bone health. In recent years the spectrum of vitamin D target organs has expanded and a reproductive role is supported by the presence of the vitamin D receptor (VDR) and the vitamin D metabolizing enzymes in the gonads, reproductive tract, and human spermatozoa. Interestingly, expression levels of VDR and the vitamin D inactivating enzyme CYP24A1 in human spermatozoa serve as positive predictive markers of semen quality and are higher expressed in spermatozoa from normal than infertile men...
September 28, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27584605/body-weight-and-25-hidroxyvitamin-d-follicular-levels-a-prospective-study-of-women-submitted-to-in-vitro-fertilization
#5
Vitor As Deriquehem, Roberto A Antunes, Mila W Reginatto, Ana C Mancebo, Patricia Areas, Enrrico Bloise, Maria do Carmo B de Souza, Tania M Ortiga-Carvalho
OBJECTIVE: Vitamin D deficiency has been largely related to infertility in animals. However, data demonstrating a direct association between hypovitaminosis D and infertility in humans are still conflicting. Increased body weight and an elevated body mass index (BMI) are known for their association with infertility. Therefore, this study attempted to verify whether increases in body weight and the BMI were associated with lower 25-hidroxyvitamin D [25(OH)D3] levels in the follicular fluid (FF) of patients treated for infertility with intracytoplasmic sperm injections (ICSI)...
2016: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/27496946/vitamin-d-deficiency-and-low-ionized-calcium-are-linked-with-semen-quality-and-sex-steroid-levels-in-infertile-men
#6
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
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...
August 2016: Human Reproduction
https://www.readbyqxmd.com/read/27465382/serum-25-hydroxyvitamin-d-concentrations-and-treatment-outcomes-of-women-undergoing-assisted-reproduction
#7
Laura Abadia, Audrey J Gaskins, Yu-Han Chiu, Paige L Williams, Myra Keller, Diane L Wright, Irene Souter, Russ Hauser, Jorge E Chavarro
BACKGROUND: Vitamin D deficiency impairs fertility in animal models, but the role of vitamin D in human fertility or treatment of infertility is less clear. OBJECTIVE: We examined the association between circulating 25-hydroxyvitamin D [25(OH)D] concentrations and the outcome in women undergoing assisted reproduction technologies (ARTs). DESIGN: We randomly selected 100 women undergoing infertility treatment with ART enrolled in an ongoing prospective cohort study who underwent 168 treatment cycles...
September 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27246740/nutrient-patterns-and-asthenozoospermia-a-case-control-study
#8
G Eslamian, N Amirjannati, B Rashidkhani, M-R Sadeghi, A Hekmatdoost
The association of dietary nutrient patterns and sperm motility is not yet well elucidated, and previous studies have just focused on the isolated nutrients. This case-control study examined the association of nutrient patterns with asthenozoospermia among Iranian men. In total, 107 incident asthenozoospermic men and 235 age-matched controls were interviewed through the infertility clinics in Tehran, Iran, from January 2012 to November 2013. Semen quality data were analysed according to the fifth edition of WHO guideline...
June 1, 2016: Andrologia
https://www.readbyqxmd.com/read/27170434/vitamin-d-deficiency-and-pregnancy-rates-following-frozen-thawed-embryo-transfer-a-prospective-cohort-study
#9
Arne van de Vijver, Panagiotis Drakopoulos, Lisbet Van Landuyt, Alberto Vaiarelli, Christophe Blockeel, Samuel Santos-Ribeiro, Herman Tournaye, Nikolaos P Polyzos
STUDY QUESTION: What is the effect of vitamin D deficiency on the pregnancy rates following frozen embryo transfer (FET)?. SUMMARY ANSWER: Vitamin D deficiency does not affect pregnancy rates in FET cycles. WHAT IS KNOWN ALREADY: Although there is evidence that the potential impact of vitamin D deficiency on reproductive outcome may be mediated through a detrimental effect on oocyte or embryo quality, the rationale of our design was based on evidence derived from basic science, suggesting that vitamin D may have a key role in endometrial receptivity and implantation...
August 2016: Human Reproduction
https://www.readbyqxmd.com/read/27022933/serum-vitamin-d-status-and-in-vitro-fertilization-outcomes-a-systematic-review-and-meta-analysis
#10
REVIEW
Shi Shi Lv, Ji Ying Wang, Xiao Qian Wang, Yan Wang, Yong Xu
OBJECTIVE: To assess the correlation between serum 25-hydroxy vitamin D [25(OH)D] status and outcomes of in vitro fertilization (IVF) in infertile women through review systematically. METHODS: We used Embase, Pubmed, and Cochrane database to identify all studies that assessed the correlation between serum vitamin D levels and IVF outcomes in infertile women up until 30 June 2015, with the restricted language of English. We included studies that compared IVF outcomes between infertile women vitamin D <20 ng/ml and vitamin D ≥20 ng/ml...
June 2016: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/27003458/association-of-vitamin-d-with-outcome-after-intra-cytoplasmic-sperm-injection
#11
Umme Hani Abdullah, Salima Lalani, Fatima Syed, Sara Arif, Rehana Rehman
OBJECTIVE: To observe effects of vitamin D levels on pregnancy outcome after intra cytoplasmic sperm injection (ICSI). METHOD: It was a cross-sectional study conducted in Australian Concept Infertility Medical Center from July 2011 to August 2014. Estimation of 25-hydroxy cholecalciferol (25-OHD) of consented females (252) was done before treatment protocol for ICSI. Results of β hCG performed 14 days after embryo transfer categorized groups; Pregnant with ß hCG more than 25 IU/mL and rest included in non-pregnant group...
April 14, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/26992658/investigation-of-serum-vitamin-d-levels-in-chinese-infertile-men
#12
C-L Zhu, Q-F Xu, S-X Li, Y-C Wei, G-C Zhu, C Yang, Y-C Shi
Recently, the question of whether vitamin D exerts an effect on the pathogenic process of infertility has become the centre of attention. There are some controversial conclusions on this issue. Based on previous studies, we sought to explore the difference of serum 25-hydroxyvitamin D3 , 1,25-dihydroxyvitamin D3 levels between infertile patients and fertile men, and to find the influence on semen quality. The analysis of serum 25-hydroxyvitamin D3 level showed no significant difference between infertile patients and fertile men...
March 18, 2016: Andrologia
https://www.readbyqxmd.com/read/26991835/vitamin-d-and-gonadal-function-in-men-a-potential-inverse-u-shaped-association
#13
S Karras, P Anagnostis, K Kotsa, D G Goulis
Accumulating evidence from animal and human studies suggests that vitamin D, apart from its regulatory effects on musculoskeletal health, is involved in reproductive function in both genders. The basis of the interplay between vitamin D and reproduction lays on the presence of both vitamin D receptor (VDR) and 1α-hydroxylase (CYP27B1) enzyme in reproductive organs. In males, VDR are present in testis, epididymis, prostate, and seminal vesicles. In Sertoli cells, whose secretory activities are ion channel-dependent, vitamin D has been shown to stimulate calcium uptake through a nuclear receptor activity...
May 2016: Andrology
https://www.readbyqxmd.com/read/26904855/-vitamin-d3-and-male-reproduction
#14
REVIEW
Lin-Lin He, Fei Lan, Huan Xu, Wang Yong-Ji
The classical effects of vitamin D3 are modulating calcium and phosphorus metabolic balance and maintaining bone health in vivo. It has been shown that vitamin D3 could regulate animal reproduction. Vitamin D metabolic enzymes synthesize and degrade active vitamin D3 and its metabolic intermediates, and active vitamin D3 exerts its biological effects through binding to vitamin D receptor (VDR). VDR and vitamin D metabolic enzymes expressed in male reproductive system, it suggest that vitamin D3 plays a pivotal role in male reproductive biology...
October 2015: Sheng Li Ke Xue Jin Zhan [Progress in Physiology]
https://www.readbyqxmd.com/read/26747961/role-of-vitamin-d-in-female-reproduction
#15
REVIEW
Seyedeh Zahra Shahrokhi, Firouzeh Ghaffari, Faranak Kazerouni
Vitamin D is a fat-soluble vitamin that belongs to the family of steroid hormones. The biological actions of vitamin D are exerted through a soluble protein, the vitamin D receptor (VDR). VDR is a transcription factor located in the nuclei of target cells that mediates the genomic action of the active form of vitamin D (1,25(OH)2D3). This transcription factor is distributed in various tissues, including the reproductive system. The presence of VDR in female reproductive tissue suggests that vitamin D is involved in female reproduction...
April 1, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/26633484/high-prevalence-of-vitamin-d-deficiency-in-infertile-women-referring-for-assisted-reproduction
#16
Luca Pagliardini, Paola Vigano', Michela Molgora, Paola Persico, Andrea Salonia, Simona Helda Vailati, Alessio Paffoni, Edgardo Somigliana, Enrico Papaleo, Massimo Candiani
A comprehensive analysis of the vitamin D status of infertile women is the first step in understanding hypovitaminosis impact on reproductive potential. We sought to determine vitamin D profiles of women attending an infertility center and to investigate non-dietary determinants of vitamin D status in this population. In this cross-sectional analysis, a cohort of 1072 women (mean age ± standard deviation 36.3 ± 4.4 years) attending an academic infertility center was used to examine serum 25-hydroxy-vitamin D (25(OH)D) levels in relation to demographic characteristics, seasons and general health risk factors...
December 2015: Nutrients
https://www.readbyqxmd.com/read/26632609/aldh-enzyme-expression-is-independent-of-the-spermatogenic-cycle-and-their-inhibition-causes-misregulation-of-murine-spermatogenic-processes
#17
Travis Kent, Samuel L Arnold, Rachael Fasnacht, Ross Rowsey, Debra Mitchell, Cathryn A Hogarth, Nina Isoherranen, Michael D Griswold
Perturbations in the vitamin A metabolism pathway could be a significant cause of male infertility, as well as a target toward the development of a male contraceptive, necessitating the need for a better understanding of how testicular retinoic acid (RA) concentrations are regulated. Quantitative analyses have recently demonstrated that RA is present in a pulsatile manner along testis tubules. However, it is unclear if the aldehyde dehydrogenase (ALDH) enzymes, which are responsible for RA synthesis, contribute to the regulation of these RA concentration gradients...
January 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/26603331/-predictive-value-of-vitamin-d-plasma-levels-on-pregnancy-rates-in-a-cohort-of-ivf-patients
#18
C Trably, A Brosse, I Plotton, J Berthillier, P Du Mesnildot, S Hadj, J Lornage, B Salle
OBJECTIVE: To determine a possible correlation between plasma levels of vitamin D and pregnancy rates obtained by in vitro fertilization (IVF). PATIENTS AND METHODS: One hundred and ninety-eight womens participated in an IVF cycle from January to May 2012 in a prospective study. During the follicular phase locking, serum fluid was collected for vitamin D, calcium, FSH and estradiol analysis. The serum bhCG was checked 16 days after oocyte collect. Clinical pregnancy was confirmed by transvaginal sonography with at least one gestational sac in the uterine cavity...
November 2015: Gynécologie, Obstétrique & Fertilité
https://www.readbyqxmd.com/read/26488941/late-onset-hypogonadism-the-advantages-of-treatment-with-human-chorionic-gonadotropin-rather-than-testosterone
#19
Sandro La Vignera, Rosita Angela Condorelli, Laura Cimino, Giorgio Ivan Russo, Giuseppe Morgia, Aldo E Calogero
The traditional pharmacological treatment of patients with late onset hypogonadism (LOH) is represented by different formulations of testosterone (T) or alternatively by the extractive human chorionic gonadotropin (HCG). The hormone replacement treatment (HRT) is associated with the potential increase of hematocrit, serum concentrations of prostate-specific antigen (PSA) and prostate volume. Moreover, the gynecomastia represent a condition frequently associated with HRT. Recent evidences showed the role of leydig cells in the 25-hydroxylation of vitamin D and the elevated frequency of hypovitaminosis D among LOH patients...
2016: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/26458343/association-of-vitamin-d-receptor-gene-polymorphisms-with-polycystic-ovary-syndrome-among-indian-women
#20
Shilpi Dasgupta, Joyita Dutta, Sandhya Annamaneni, Neelaveni Kudugunti, Mohan Reddy Battini
BACKGROUND & OBJECTIVES: The Vitamin-D receptor (VDR) regulates vitamin D levels and calcium metabolism in the body and these are known to be associated with endocrine dysfunctions, insulin resistance and type-2 diabetes in polycystic ovarian syndrome (PCOS). Studies on VDR polymorphisms among PCOS women are sparse. We undertook this study to investigate the association pattern of VDR polymorphisms (Cdx2, Fok1, Apa1 and Taq1) with PCOS among Indian women. METHODS: For the present study, 250 women with PCOS and 250 normal healthy control women were selected from Hyderabad city, Telangana, India...
September 2015: Indian Journal of Medical Research
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