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Reproductive endocrinology

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https://www.readbyqxmd.com/read/28497815/reproductive-endocrinology-puberty-timing-and-cancer-risk
#1
David Holmes
No abstract text is available yet for this article.
May 12, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28492802/gonadotrophic-prolactin-corticosterone-and-gonadal-hormones-levels-over-15-months-in-giant-amazon-river-turtles-podocnemis-expansa-schweigger-1812-testudines-podocnemididae-in-captive-conditions
#2
G E Freneau, V A Sá, C R Franci, D Vieira, B N Freneau
In order to achieve successful captive breeding the Podocnemis expansa, it is necessary to study their reproductive endocrinology. The purpose of this research was to evaluate and characterize plasma concentrations in gonadotrophic, gonadic, corticosterone and prolactin hormones from Giant Amazon Turtles under captive conditions. Blood samples were collected over a 15 month period. The samples were assayed by the use of radioimmunoassay, prolactin, corticosterone, LH, FSH, testosterone, 17β-estradiol and progesterone...
May 4, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28488742/feminization-of-the-fat-distribution-pattern-of-children-and-adolescents-in-a-recent-german-population
#3
Christiane Scheffler, Melanie Dammhahn
OBJECTIVES: During the early 1990s, the economic and political situation in eastern Germany changed overnight. Here, we use the rare chance of an experiment-like setting in humans and aim to test whether the rapid change of environmental conditions in eastern Germany in the 1990s led to a change in the sex-specific fat distribution pattern, an endocrine-influenced phenotypic marker. METHODS: Based on a cross-sectional data set of 6- to 18-year-old girls and boys measured between 1982-1991 and 1997-2012, we calculated a skinfold ratio of triceps to subscapular and percentage of body fat...
May 10, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28458884/urinary-profiles-of-progestin-and-androgen-metabolites-in-female-polar-bears-during-parturient-and-non-parturient-cycles
#4
Katrina K Knott, Gabriela F Mastromonaco, Megan A Owen, Andrew J Kouba
Due to the environmental and anthropogenic impacts that continue to threaten the reproductive success of polar bears, a more detailed understanding of their reproductive cycle is needed. Captive populations of polar bears provide an excellent opportunity to learn more about the reproductive physiology of the species. Progestin (P4) and androgen (T) metabolites in urine, and their ratio (P4:T), were examined during 11 reproductive cycles of captive female polar bears (n = 4) to characterize the steroid hormone profile during pregnancy and determine possible variations related to reproductive failure...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28458460/childbirth-and-fertility-preservation-in-childhood-and-adolescent-cancer-patients-a-second-national-survey-of-japanese-pediatric-endocrinologists
#5
Yoko Miyoshi, Tohru Yorifuji, Reiko Horikawa, Ikuko Takahashi, Keisuke Nagasaki, Hiroyuki Ishiguro, Ikuma Fujiwara, Junko Ito, Mari Oba, Hiroyuki Fujisaki, Masashi Kato, Chikako Shimizu, Tomoyasu Kato, Kimikazu Matsumoto, Haruhiko Sago, Tetsuya Takimoto, Hiroshi Okada, Nao Suzuki, Susumu Yokoya, Tsutomu Ogata, Keiichi Ozono
Although existing guidelines recommend long-term follow-up of childhood cancer survivors (CCSs), their fertility has not been fully investigated in Japan. To address this issue, we organized a working panel consisting of medical specialists in foundation hospitals. We conducted questionnaire surveys targeting pediatric endocrinologists regarding reproduction in pediatric and adolescent cancer patients in collaboration with the CCS committee of the Japanese Society for Pediatric Endocrinology (JSPE). The first questionnaire was sent to 178 directors or councilors of the JSPE, and the second was sent to those who had provided answers on their experience with childbirth or fertility preservation...
2017: Clinical Pediatric Endocrinology: Case Reports and Clinical Investigations: Official Journal of the Japanese Society for Pediatric Endocrinology
https://www.readbyqxmd.com/read/28429778/reproductive-endocrinology-potential-new-therapy-for-hot-flushes
#6
Claire Greenhill
No abstract text is available yet for this article.
June 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28390569/infertility-prevention-and-management
#7
REVIEW
Emily C Somers, Wendy Marder
Infertility and subfertility, menstrual irregularities, and decreased parity may occur in women with autoimmune diseases due to multiple factors, including underlying inflammatory disease, gonadotoxic medications, and psychosocial issues related to living with chronic disease. Awareness of these factors, as well as validation and support of patients confronting reproductive challenges, is important for providing comprehensive care to these women. An understanding of the expanding options for fertility preservation strategies during gonadotoxic medications is essential...
May 2017: Rheumatic Diseases Clinics of North America
https://www.readbyqxmd.com/read/28379417/subcutaneous-injection-of-testosterone-is-an-effective-and-preferred-alternative-to-intramuscular-injection-demonstration-in-female-to-male-transgender-patients
#8
Daniel I Spratt, India Stewart, Clara Savage, Wendy Craig, Norman P Spack, Donald Walt Chandler, Lindsey V Spratt, Toni Eimicke, Jerrold S Olshan
Context: Testosterone is commonly administered intramuscularly (IM) to treat hypogonadal males and female-to-male transgender (FTM) patients. However, these injections can involve significant discomfort and may require arrangements for administration by others. Objective: We assessed whether T could be administered effectively and safely by the subcutaneously (SC) as an alternative to IM injections. Design: Retrospective cohort study. Setting: Outpatient Reproductive Endocrinology Clinic at an academic medical center...
April 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28368518/functional-hypothalamic-amenorrhea-an-endocrine-society-clinical-practice-guideline
#9
Catherine M Gordon, Kathryn E Ackerman, Sarah L Berga, Jay R Kaplan, George Mastorakos, Madhusmita Misra, M Hassan Murad, Nanette F Santoro, Michelle P Warren
Cosponsoring Associations: The American Society for Reproductive Medicine, the European Society of Endocrinology, and the Pediatric Endocrine Society. This guideline was funded by the Endocrine Society. Objective: To formulate clinical practice guidelines for the diagnosis and treatment of functional hypothalamic amenorrhea (FHA). Participants: The participants include an Endocrine Society-appointed task force of eight experts, a methodologist, and a medical writer...
May 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28367299/low-dose-urinary-human-chorionic-gonadotropin-is-effective-for-oocyte-maturation-in-in-vitro-fertilization-intracytoplasmic-sperm-injection-cycles-independent-of-body-mass-index
#10
Luis R Hoyos, Sana Khan, Jing Dai, Manvinder Singh, Michael P Diamond, Elizabeth E Puscheck, Awoniyi O Awonuga
BACKGROUND: Currently, there is no agreement on the optimal urinary derived human chorionic gonadotropin (u-hCG) dose requirement for initiating final oocyte maturation prior to oocyte collection in in vitro fertilization (IVF), but doses that range from 2500- 15000 IU have been used. We intended to determine whether low dose u-hCG was effective for oocyte maturation in IVF/intracytoplasmic sperm injection (ICSI) cycles independent of body mass index (BMI). MATERIALS AND METHODS: We retrospectively evaluated a cohort of 295 women who underwent their first IVF/ICSI cycles between January 2003 and December 2010 at the Division of Reproductive Endocrinology and Infertility, Wayne State University, Detroit, MI, USA...
April 2017: International Journal of Fertility & Sterility
https://www.readbyqxmd.com/read/28345754/second-to-fourth-digit-ratio-2d-4d-is-unrelated-to-measures-of-somatic-reproductive-effort-among-young-men-from-cebu-the-philippines
#11
Alexander V Georgiev, Calen P Ryan, Lee T Gettler, Thomas W McDade, Christopher W Kuzawa
OBJECTIVES: A low second-to-fourth (2D:4D) digit ratio, a retrospective marker of high prenatal androgens, predicts increased investment in costly sexually dimorphic traits in men in some studies, although results are mixed. Here we test the hypothesis that the association of low 2D:4D ratios with increased muscularity and decreased adiposity depends on current testosterone (T) levels, such that digit ratio will be a particularly strong predictor of outcomes among men exhibiting a mating-effort-oriented endocrinological profile (high T)...
March 27, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28342856/reproductive-endocrinology-of-vitamin-d
#12
Mette Lorenzen, Ida Marie Boisen, Li Juel Mortensen, Beate Lanske, Anders Juul, Martin Blomberg Jensen
Vitamin D is a versatile hormone with several functions beyond its well-established role in maintenance of skeletal health and calcium homeostasis. The effects of vitamin D are mediated by the vitamin D receptor, which is expressed together with the vitamin D metabolizing enzymes in the reproductive tissues. The reproductive organs are therefore responsive to and able to metabolize vitamin D locally. The exact role remains to be clarified but several studies have suggested a link between vitamin D and production/release of reproductive hormones into circulation, which will be the main focus of this review...
March 22, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28326513/manual-vs-computer-assisted-sperm-analysis-can-casa-replace-manual-assessment-of-human-semen-in-clinical-practice
#13
Joanna Talarczyk-Desole, Anna Berger, Grażyna Taszarek-Hauke, Jan Hauke, Leszek Pawelczyk, Piotr Jedrzejczak
OBJECTIVES: The aim of the study was to check the quality of computer-assisted sperm analysis (CASA) system in comparison to the reference manual method as well as standardization of the computer-assisted semen assessment. MATERIAL AND METHODS: The study was conducted between January and June 2015 at the Andrology Laboratory of the Division of Infertility and Reproductive Endocrinology, Poznań University of Medical Sciences, Poland. The study group consisted of 230 men who gave sperm samples for the first time in our center as part of an infertility investigation...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28315665/physician-scientists-in-obstetrics-and-gynecology-predictors-of-success-in-obtaining-independent-research%C3%A2-funding
#14
Ijeoma Okeigwe, Cynthia Wang, Joseph A Politch, Linda J Heffner, Wendy Kuohung
BACKGROUND: Obstetrics and gynecology departments receive the smallest amount of National Institutes of Health research funding and have significantly lower application success rates compared to pediatric, internal medicine, and surgery departments. The development of mentored early career development training grants (K awards) has been one strategy implemented by the National Institutes of Health to help aspiring physician-scientists establish independent research careers. OBJECTIVE: The purpose of this study is to describe the cohort of obstetrics and gynecology physician-scientists who were K08, K12, and K23 recipients from 1988 through 2015 and to identify predictors of success in obtaining independent federal funding, as defined by acquisition of an R01, R21, R34, U01, U54, P01, or P50 award...
March 16, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28292614/embryo-transfer-simulation-improves-pregnancy-rates-and-decreases-time-to-proficiency-in-reproductive-endocrinology-and-infertility-fellow-embryo-transfers
#15
Ryan J Heitmann, Micah J Hill, John M Csokmay, Justin Pilgrim, Alan H DeCherney, Shad Deering
OBJECTIVE: To design and evaluate an ET simulator to train Reproductive Endocrinology and Infertility (REI) fellows' techniques of ET. DESIGN: Simulation model development and retrospective cohort analysis. SETTING: Not applicable. PATIENT(S): Patients undergoing IVF. INTERVENTION(S): Simulation model evaluation and implementation of ET simulation training. MAIN OUTCOME MEASURE(S): Pregnancy rates...
March 11, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28277140/interactive-case-based-learning-improves-resident-knowledge-and-confidence-in-reproductive-endocrinology-and-infertility
#16
Kara N Goldman, Ashley W Tiegs, Kristen Uquillas, Margaret Nachtigall, M Elizabeth Fino, Abigail F Winkel, Veronica Lerner
Resident physicians' scores on the REI section of the CREOG exam are traditionally low, and nearly 40% of house staff nation-wide perceive their REI knowledge to be poor. We aimed to assess whether an interactive case-based group-learning curriculum would narrow the REI knowledge gap by improving understanding and retention of core REI concepts under the time constraints affecting residents. A three-hour case-based workshop was developed to address four primary CREOG objectives. A multiple-choice test was administered immediately before and after the intervention and 7 weeks post-workshop, to evaluate both knowledge and confidence...
February 21, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28246045/characterisation-of-the-transcriptome-of-male-and-female-wild-type-guppy-brains-with-rna-seq-and-consequences-of-exposure-to-the-pharmaceutical-pollutant-17%C3%AE-ethinyl-estradiol
#17
Minna Saaristo, Bob B M Wong, Laura Mincarelli, Allison Craig, Christopher P Johnstone, Mayumi Allinson, Kai Lindström, John A Craft
Waterways are increasingly being contaminated by chemical compounds that can disrupt the endocrinology of organisms. One such compound is 17α-ethinyl estradiol (EE2), a synthetic estrogen used in the contraceptive pill. Despite considerable research interest in the effects of EE2 on reproduction and gene expression, surprisingly, only a few studies have capitalised on technologies, such as next-generation sequencing (NGS), to uncover the molecular pathways related to EE2 exposure. Accordingly, using high-throughput sequencing technologies, the aim of our study was to explore the effects of EE2 on brain transcriptome in wild-type male and female guppy (Poecilia reticulata)...
February 16, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28239427/food-components-and-contaminants-as-anti-androgenic-molecules
#18
REVIEW
Daniele Marcoccia, Marco Pellegrini, Marco Fiocchetti, Stefano Lorenzetti, Maria Marino
Androgens, the main male sex steroids, are the critical factors responsible for the development of the male phenotype during embryogenesis and for the achievement of sexual maturation and puberty. In adulthood, androgens remain essential for the maintenance of male reproductive function and behavior. Androgens, acting through the androgen receptor (AR), regulate male sexual differentiation during development, sperm production beginning from puberty, and maintenance of prostate homeostasis. Several substances present in the environment, now classified as endocrine disruptors (EDCs), strongly interfere with androgen actions in reproductive and non-reproductive tissues...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/28228319/optimizing-natural-fertility-a%C3%A2-committee-opinion
#19
(no author information available yet)
This Committee Opinion provides practitioners with suggestions for optimizing the likelihood of achieving pregnancy in couples/individuals attempting conception who have no evidence of infertility. This document replaces the document of the same name previously published in 2013, Fertil Steril 2013;100(3):631-7.
January 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28220080/validation-of-a-method-for-the-assessment-of-urinary-neopterin-levels-to-monitor-health-status-in-non-human-primate-species
#20
Verena Behringer, Jeroen M G Stevens, Fabian H Leendertz, Gottfried Hohmann, Tobias Deschner
Determining individual health status is of great importance for a better understanding of life history trade-offs between growth, reproduction, and maintenance. However, existing immunological methods are invasive and therefore not suitable for investigating health status in wild populations. Thus, there is an urgent need for non-invasive methods to assess the immune status of animals. Neopterin is involved in the cell-mediated pathway of the immune response (Th1-type), secreted during the activation of monocytes and macrophages...
2017: Frontiers in Physiology
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