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Reproductive endocrinology

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https://www.readbyqxmd.com/read/28161857/on-developing-a-thesis-for-reproductive-endocrinology-and-infertility-fellowship-a-case-study-of-ultra-low-2-oxygen-tension-for-extended-culture-of-human-embryos
#1
REVIEW
Daniel J Kaser
Fellows in Reproductive Endocrinology and Infertility training are expected to complete 18 months of clinical, basic, or epidemiological research. The goal of this research is not only to provide the basis for the thesis section of the oral board exam but also to spark interest in reproductive medicine research and to provide the next generation of physician-scientists with a foundational experience in research design and implementation. Incoming fellows often have varying degrees of training in research methodology and, likewise, different career goals...
February 4, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28161526/low-fertility-preservation-utilization-among-transgender-youth
#2
Leena Nahata, Amy C Tishelman, Nicole M Caltabellotta, Gwendolyn P Quinn
PURPOSE: Research demonstrates a negative psychosocial impact of infertility among otherwise healthy adults, and distress among adolescents facing the prospect of future infertility due to various medical conditions and treatments that impair reproductive health. Guidelines state that providers should counsel transgender youth about potential infertility and fertility preservation (FP) options prior to initiation of hormone therapy. The purpose of this study was to examine the rates of fertility counseling and utilization of FP among a cohort of adolescents with gender dysphoria seen at a large gender clinic...
February 1, 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28127831/vitamin-d-receptor-polymorphisms-and-the-polycystic-ovary-syndrome-a-systematic-review
#3
REVIEW
Guilherme Victor Oliveira Pimenta Dos Reis, Natália Alves Gontijo, Kathryna Fontana Rodrigues, Michelle Teodoro Alves, Cláudia Natália Ferreira, Karina Braga Gomes
Polycystic ovary syndrome (PCOS) is the most frequent endocrinological disorder that affects women of reproductive age, leading to metabolic alterations, such as hyperandrogenism, obesity, menstrual irregularities, insulin resistance, and polycystic ovaries. The etiology remains unclear, but several genetic and environmental factors have been correlated with manifestations of this syndrome. Vitamin D plays important roles in metabolic pathways affected by PCOS, including calcium homeostasis, the insulin pathway, and sex hormone synthesis...
January 27, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28079780/subspecialty-influence-on-scientific-peer-review-for-an-obstetrics-and-gynecology-journal-with-a-high-impact-factor
#4
Laura I Parikh, Rebecca S Benner, Thomas W Riggs, Nicholas Hazen, Nancy C Chescheir
OBJECTIVE: To evaluate whether quality of peer review and reviewer recommendation differ based on reviewer subspecialty in obstetrics and gynecology and to determine the role of experience on reviewer recommendation. METHODS: We performed a retrospective cohort study of reviews submitted to Obstetrics & Gynecology between January 2010 and December 2014. Subspecialties were determined based on classification terms selected by each reviewer and included all major obstetrics and gynecology subspecialties, general obstetrics and gynecology, and nonobstetrics and gynecology categories...
February 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28043344/relationships-among-temperament-acute-and-chronic-cortisol-and-testosterone-concentrations-and-breeding-soundness-during-performance-testing-of-angus-bulls
#5
S A Lockwood, H G Kattesh, J D Rhinehart, L G Strickland, P D Krawczel, J B Wilkerson, F D Kirkpatrick, A M Saxton
The aim of this study was to examine relationships among temperament, endocrinology, and reproductive parameters of bulls enrolled in an 84-day performance test. Angus bulls (n = 60) were housed in six pens grouped by age and weight. Pen scores (PS; 1 = docile to 5 = very aggressive) were assigned on Days -1, 27, 55, and 83 of the performance test. On the following day, blood and hair samples were collected, and body weight (BW) and exit velocity (EV) were recorded. Bulls were split into two categories based on; Day -1 PS (PScalm = PS 1 or 2; PSexcitable = PS 3 or 4) and Day 0 EV (EVcalm = slowest 20 bulls; EVexcitable = fastest 20 bulls)...
February 2017: Theriogenology
https://www.readbyqxmd.com/read/28007789/reproductive-hormones-of-icsi-conceived-young-adult-men-the-first-results
#6
Florence Belva, Mathieu Roelants, Jean De Schepper, André Van Steirteghem, Herman Tournaye, Maryse Bonduelle
STUDY QUESTION: Are reproductive hormone levels (FSH, LH, inhibin B and testosterone) in male offspring conceived by ICSI because of male infertility comparable with those from peers born after spontaneous conception? SUMMARY ANSWER: In this cohort of 54 young men conceived by ICSI because of male-factor infertility, mean and median reproductive hormone levels were found to be comparable with results from spontaneously conceived peers, but ICSI-conceived men were more likely to have low inhibin B (<10th percentile) and high FSH (>90th percentile) levels...
December 21, 2016: Human Reproduction
https://www.readbyqxmd.com/read/27930278/for-love-not-money-the-financial-implications-of-surgical-fellowship-training
#7
Paul M Inclan, Adam S Hyde, Michael Hulme, Jeffrey E Carter
Surgical residents cite increased income potential as a motivation for pursuing fellowship training, despite little evidence supporting this perception. Thus, our goal is to quantify the financial impact of surgical fellowship training on financial career value. By using Medical Group Management Association and Association of American Medical Colleges physician income data, and accounting for resident salary, student debt, a progressive tax structure, and forgone wages associated with prolonged training, we generated a net present value (NPV) for both generalist and subspecialist surgeons...
September 2016: American Surgeon
https://www.readbyqxmd.com/read/27929034/reproductive-endocrinology-the-emotional-cost-of-contraception
#8
Rachel A Ross, Ursula B Kaiser
No abstract text is available yet for this article.
December 8, 2016: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/27913150/juvenile-hormone-titers-ovarian-status-and-epicuticular-hydrocarbons-in-gynes-and-workers-of-the-paper-wasp-belonogaster-longitarsus
#9
Hans C Kelstrup, Klaus Hartfelder, Nanike Esterhuizen, Theresa C Wossler
The prevailing paradigm for social wasp endocrinology is that of juvenile hormone (JH) functioning pleiotropically in potential and actual queens, where it fuels dominance behaviors, stimulates ovarian growth and/or affects the production of status-linked cuticular compounds. In colonies with annual cycles (e.g., temperate-zone species), female adults produced at the end of the summer (called gynes) are physiologically primed to hibernate. Despite the absence of egg-laying in the pre-overwintering phase, gynes engage in dominance interactions that may affect reproductive potential following hibernation...
November 29, 2016: Journal of Insect Physiology
https://www.readbyqxmd.com/read/27882049/different-effects-of-myoinositol-plus-folic-acid-versus-combined-oral-treatment-on-androgen-levels-in-pcos-women
#10
Ali Cenk Ozay, Ozlen Emekci Ozay, Recep Emre Okyay, Erkan Cagliyan, Tuncay Kume, Bulent Gulekli
Recently, myoinositol (myo-ins) and folic acid combination has gained an important role for treating Polycystic Ovary Syndrome (PCOS), in addition to combined oral contraceptives (COC). We aimed to examine myo-ins effects on anti-Mullerian hormone (AMH) levels and compare them with those ones obtained administering COC. In this prospective study, 137 PCOS patients, diagnosed according to Rotterdam criteria and admitted to the Reproductive Endocrinology and Infertility Outpatient Clinic at Dokuz Eylul University (Izmir, Turkey), were included...
2016: International Journal of Endocrinology
https://www.readbyqxmd.com/read/27866819/endocrinology-of-human-female-sexuality-mating-and-reproductive-behavior
#11
REVIEW
Natalie V Motta-Mena, David A Puts
Hormones orchestrate and coordinate human female sexual development, sexuality, and reproduction in relation to three types of phenotypic changes: life history transitions such as puberty and childbirth, responses to contextual factors such as caloric intake and stress, and cyclical patterns such as the ovulatory cycle. Here, we review the endocrinology underlying women's reproductive phenotypes, including sexual orientation and gender identity, mate preferences, competition for mates, sex drive, and maternal behavior...
November 17, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/27856292/the-challenge-hypothesis-where-it-began-and-relevance-to-humans
#12
REVIEW
John C Wingfield
A contribution to a special issue on Hormones and Human Competition. Over 40years ago assay methods that allowed the accurate measurement of circulating levels of hormones were developed for the first time enabling us to sample free-living as well as captive animals. This led to a new concept called "field endocrinology". It quickly became apparent that endocrine profiles of animals under natural conditions were very different from congeners in captivity. Furthermore, hormone data could be organized by functional units (e...
November 14, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/27853912/abstracts-from%C3%A2-the-translational-reproductive-biology-and-clinical-reproductive-endocrinology-conference%C3%A2-held-novembrer-17-20-2016
#13
(no author information available yet)
No abstract text is available yet for this article.
December 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27842788/toxicology-in-reproductive-endocrinology
#14
REVIEW
Roohi Jeelani, Martin H Bluth, Husam M Abu-Soud
Fertility relies on a series of time dependent events, which are largely regulated by hormones. Concentration and function of these hormones can be altered by exposure of consumed and environmental toxins. It is of important to consider the dose and timing of toxin exposures in assessing the impact of them on reproductive health, however the utility of laboratory assessment in this regard is not well established. General laboratory assessment of reproduction and infertility includes hormone evaluation (hCG, prolactin, TSH, free thyroxin, FSH, LH and androgens among others) and treatment is via various assisted reproductive technologies...
December 2016: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/27810183/obesity-may-be-the-common-pathway-for-sleep-disordered-breathing-in-women-with-polycystic-ovary-syndrome
#15
Jyotsna Suri, Jagdish Chander Suri, Bidisha Chatterjee, Pratima Mittal, Tulsi Adhikari
OBJECTIVE: Polycystic ovary syndrome (PCOS) is one of the most common endocrinological disorders in women of reproductive age, and is characterized by hyperandrogenism. It is associated with long-term metabolic dysfunctions including sleep-disordered breathing (SDB). We hypothesized that the increased prevalence of SDB in PCOS results from raised testosterone levels. METHODS: This was a prospective, cross-sectional, case-control study in which 50 case patients with untreated PCOS and 100 control subjects were included...
August 2016: Sleep Medicine
https://www.readbyqxmd.com/read/27783387/testing-the-reproductive-groundplan-hypothesis-in-ants-hymenoptera-formicidae
#16
Tobias Pamminger, William O H Hughes
The evolution of complex societies with obligate reproductive division of labor represents one of the major transitions in evolution. In such societies, functionally sterile individuals (workers) perform many of fitness-relevant behaviors including allomaternal ones, without getting any direct fitness benefits. The question of how such worker division of labor has evolved remains controversial. The reproductive groundplan hypothesis (RGPH) offers a powerful proximate explanation for this evolutionary leap. The RGPH argues that the conserved genetic and endocrinological networks regulating fitness-relevant behavior (e g...
January 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27779622/mothers-do-it-differently-reproductive-experience-alters-fear-extinction-in-female-rats-and-women
#17
J S Milligan-Saville, B M Graham
Fear extinction is the laboratory basis of exposure therapy for anxiety disorders. Recent findings have revealed that estradiol is necessary to the consolidation of extinction memories in females. These findings are based on studies conducted using virgin rats and young women whose reproductive history is unknown. We hypothesized that motherhood, which results in extensive endocrinological, neurobiological and behavioral changes, may lead to alterations in fear extinction in females. We used a cross-species translational approach to investigate the impact of reproductive experience on fear extinction and fear relapse in female rats (n=116) and women (n=64)...
October 25, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27758004/diagnostic-possibilities-from-a-serum-sample-clinical-value-of-new-methods-within-small-animal-reproduction-with-focus-on-anti-m%C3%A3-llerian-hormone
#18
B S Holst
During the last decade, analysis of anti-Müllerian hormone (AMH), highly conserved between mammalian species, has contributed to new information in reproductive endocrinology, due to clinically available diagnostic assays. AMH is produced solely in the gonads, in the Sertoli cells of testes and granulosa cells of the ovary, and thus offers possibilities to diagnose physiologic and pathologic conditions involving these organs. This article reviews indications for AMH analysis in cats and dogs, including diagnosing the presence of gonads, and granulosa or Sertoli cell tumours...
October 18, 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27748448/sex-hormone-binding-globulin-regulation-of-androgen-bioactivity-in-vivo-validation-of-the-free-hormone-hypothesis
#19
Michaël R Laurent, Geoffrey L Hammond, Marco Blokland, Ferran Jardí, Leen Antonio, Vanessa Dubois, Rougin Khalil, Saskia S Sterk, Evelien Gielen, Brigitte Decallonne, Geert Carmeliet, Jean-Marc Kaufman, Tom Fiers, Ilpo T Huhtaniemi, Dirk Vanderschueren, Frank Claessens
Sex hormone-binding globulin (SHBG) is the high-affinity binding protein for androgens and estrogens. According to the free hormone hypothesis, SHBG modulates the bioactivity of sex steroids by limiting their diffusion into target tissues. Still, the in vivo physiological role of circulating SHBG remains unclear, especially since mice and rats lack circulating SHBG post-natally. To test the free hormone hypothesis in vivo, we examined total and free sex steroid concentrations and bioactivity on target organs in mice expressing a human SHBG transgene...
October 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27744378/twins-conceived-using-ivf-a-follow-up-of-the-family-environment-and-psychosocial-adjustment-in-adolescence
#20
K N Anderson, J J Connor, A F Koerner, M A Rueter
STUDY QUESTION: Compared to families with IVF singletons, what are parental depressive, parent-adolescent interaction and adolescent adjustment outcomes in families with 11-17-year-old IVF twins? SUMMARY ANSWER: No differences were detected for any measured outcome between families with 11-17-year-old IVF twins and those with IVF singletons, despite high statistical power. WHAT IS KNOWN ALREADY: When IVF twins are younger than 5-years-old, parents tend to have more mental health difficulties and poorer parent-child interactions relative to IVF singletons...
October 15, 2016: Human Reproduction
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