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Reproductive endocrinology

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https://www.readbyqxmd.com/read/28804963/effect-of-housing-system-on-reproductive-behaviour-and-on-some-endocrinological-and-seminal-parameters-of-donkey-stallions
#1
A Rota, M Sgorbini, D Panzani, F Bonelli, P Baragli, N Ille, D Gatta, C Sighieri, L Casini, M M Maggiorelli, C Aurich, F Camillo
Reproductive management of male donkeys employed for artificial breeding has been poorly studied. The aim of this study was to evaluate the effect of housing system, with the animals grouped together in a paddock or kept in individual boxes, on sexual behaviour, cortisol and testosterone concentration and seminal characteristics of adult male donkeys. The study included four Amiata donkey jacks (stallions) from which ejaculates, saliva and blood were collected during two distinct 3 weeks periods, one in the group and one in the box housing system...
August 14, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28789706/small-leucine-rich-proteoglycans-slrps-in-the-endometrium-of-polycystic-ovary-syndrome-women-a-pilot-study
#2
Ricardo Santos Simões, José Maria Soares-Jr, Manuel J Simões, Helena B Nader, Maria Cândida P Baracat, Gustavo Arantes R Maciel, Paulo C Serafini, Ricardo Azziz, Edmund C Baracat
BACKGROUND: Small leucine-rich proteoglycans (SLRPs) play an important role in tissue homeostasis and cell proliferation since these proteoglycans sequester multiple growth factors. However, the content of SLRPs in the endometrium of polycystic ovary syndrome (PCOS) women is unknown. Our purpose was to test the hypothesis that excessive endometrial proliferation in PCOS may be partly related to abnormalities in SLRPs. METHODS: In a cross section study a total of 20 endometrial samples were collected from 10 patients with PCOS and 10 ovulatory women during their proliferative (pre-ovulatory) phase...
August 8, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28760233/biochemical-and-imaging-diagnostics-in-endocrinology-predictors-of-fertility
#3
REVIEW
Erica B Mahany, John F Randolph
One of the limiting factors of fertility testing is the relative inefficiency of human reproduction. A careful history and physical examination must be performed on each patient to inform the particular diagnostic tests that are chosen and to create a meaningful treatment plan. Testing parameters, such as sensitivity, specificity, positive predictive value, and negative predictive value, can help to interpret test results, although there is no perfect screening test for the various causes of infertility. This article describes the 4 major categories of testing for infertility: ovarian reserve, ovulatory status, gamete transport, and male factor...
September 2017: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/28727004/physiology-and-endocrinology-symposium-postnatal-reproductive-development-and-the-lactocrine-hypothesis
#4
F F Bartol, A A Wiley, A F George, D J Miller, C A Bagnell
Maternal effects on development can program cell fate and dictate offspring phenotype. Such effects do not end at birth, but extend into postnatal life through signals communicated from mother to offspring in first milk (colostrum). Transmission of bioactive factors from mother to offspring as a specific consequence of nursing defines a lactocrine mechanism. The female reproductive tract is not fully formed at birth (postnatal day = PND 0). Data for ungulates and mice indicate that disruption of development during neonatal life can have lasting effects on the form and function of uterine tissues...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28724173/a-comparative-study-between-myo-inositol-and-metformin-in-the-treatment-of-insulin-resistant-women
#5
K Nas, L Tűű
OBJECTIVE: Insulin resistance (IR) is a common disorder, which can impair female fertility and is characterized by phenotypic heterogeneity. Life-style treatment and insulin sensitizers are commonly used in the management of women with IR and consequent hyperinsulinemia, in order to restore the normal endocrinological and clinical parameters. Metformin (MET) is considered one of the first approaches to this pathology but new evidences are showing promising results using myo-inositol (MYO) in the management of this pathology...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28710978/relationships-between-pops-biometrics-and-circulating-steroids-in-male-polar-bears-ursus-maritimus-from-svalbard
#6
Tomasz M Ciesielski, Ingunn Tjelta Hansen, Jenny Bytingsvik, Martin Hansen, Elisabeth Lie, Jon Aars, Bjørn M Jenssen, Bjarne Styrishave
The aim of this study was to determine the effects of persistent organic pollutants (POPs) and biometric variables on circulating levels of steroid hormones (androgens, estrogens and progestagens) in male polar bears (Ursus maritimus) from Svalbard, Norway (n = 23). Levels of pregnenolone (PRE), progesterone (PRO), androstenedione (AN), dehydroepiandrosterone (DHEA), testosterone (TS), dihydrotestosterone (DHT), estrone (E1), 17α-estradiol (αE2) and 17β-estradiol (βE2) were quantified in polar bear serum by gas chromatography tandem mass spectrometry (GC-MS/MS), while POPs were measured in plasma...
July 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28705803/clinical-practice-guidelines-for-the-care-of-girls-and-women-with-turner-syndrome-proceedings-from-the-2016-cincinnati-international-turner-syndrome-meeting
#7
Claus H Gravholt, Niels H Andersen, Gerard S Conway, Olaf M Dekkers, Mitchell E Geffner, Karen O Klein, Angela E Lin, Nelly Mauras, Charmian A Quigley, Karen Rubin, David E Sandberg, Theo C J Sas, Michael Silberbach, Viveca Söderström-Anttila, Kirstine Stochholm, Janielle A van Alfen-van derVelden, Joachim Woelfle, Philippe F Backeljauw
Turner syndrome affects 25-50 per 100,000 females and can involve multiple organs through all stages of life, necessitating multidisciplinary approach to care. Previous guidelines have highlighted this, but numerous important advances have been noted recently. These advances cover all specialty fields involved in the care of girls and women with TS. This paper is based on an international effort that started with exploratory meetings in 2014 in both Europe and the USA, and culminated with a Consensus Meeting held in Cincinnati, Ohio, USA in July 2016...
September 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28690863/fertility-preservation-training-for-obstetrics-and-gynecology-fellows-a-highly-desired-but-non-standardized-experience
#8
Elizabeth J N Miller, Lisa M Cookingham, Teresa K Woodruff, Ginny L Ryan, Karen M Summers, Laxmi A Kondapalli, Divya K Shah
BACKGROUND: Despite a large body of data suggesting that delivery of fertility care to cancer patients is inconsistent and frequently insufficient, there is a paucity of literature examining training in fertility preservation for those physicians expected to discuss options or execute therapy. The study objective was to compare fertility preservation training between Reproductive Endocrinology & Infertility (REI) and Gynecologic Oncology (GYN ONC) fellows and assess the need for additional education in this field...
2017: Fertility Research and Practice
https://www.readbyqxmd.com/read/28687969/impact-of-zika-virus-for-infertility-specialists-current-literature-guidelines-and-resources
#9
REVIEW
Jamie P Dubaut, Nelson I Agudelo Higuita, Alexander M Quaas
In the past 2 years, Zika virus has emerged from obscurity onto the world stage-traversing and transcending clinical specialties, basic science disciplines, and public health efforts. The spread of Zika virus has serious implications for the specialty of reproductive endocrinology and infertility. Our patients, practices, and labs-worldwide and specifically in the USA-have been impacted by this teratogenic, sexually transmitted, largely asymptomatic virus. While the World Health Organization's Public Emergency of International Concern designation has lapsed as major epidemics have subsided and understanding of risks is in part clarified, the acute and long-term threat to pregnant patients is not over...
July 7, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28662541/reproductive-endocrine-issues-in-men-with-sickle-cell-anemia
#10
REVIEW
A W Huang, O Muneyyirci-Delale
In patients with sickle cell anemia, the sickling of red blood cells is known to cause end-organ damage by infarction. In some men who are affected by sickle cell anemia, the obstruction of venous outflow of the penis causes priapism, which could lead to erectile dysfunction. There is also evidence that the disease is linked to other reproductive issues in men-specifically delayed puberty, low testosterone, and sperm abnormalities-although the causes of these problems are less clear. Treatment of sickle cell anemia can have effects on the reproductive system as well...
June 29, 2017: Andrology
https://www.readbyqxmd.com/read/28650956/in-vitro-and-in-vivo-effects-of-kisspeptin-antagonists-p234-p271-p354-and-p356-on-gpr54-activation
#11
C H J Albers-Wolthers, J de Gier, M Walen, P J S van Kooten, C B Lambalk, P A J Leegwater, B A J Roelen, A C Schaefers-Okkens, V P M G Rutten, R P M Millar, H S Kooistra
Kisspeptins (KPs) and their receptor (GPR54 or KiSS1R) play a key-role in regulation of the hypothalamic-pituitary-gonadal axis and are therefore interesting targets for therapeutic interventions in the field of reproductive endocrinology. As dogs show a rapid and robust LH response after the administration of KP10, they can serve as a good animal model for research concerning KP signaling. The aims of the present study were to test the antagonistic properties of KP analogs p234, p271, p354, and p356 in vitro, by determining the intracellular Ca2+ response of CHEM1 cells that stably express human GPR54, and to study the in vivo effects of these peptides on basal plasma LH concentration and the KP10-induced LH response in female dogs...
2017: PloS One
https://www.readbyqxmd.com/read/28621340/reproductive-endocrinology-elagolix-in-endometriosis
#12
Conor A Bradley
No abstract text is available yet for this article.
August 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28620497/painful-ovulation-in-a-46-xx-sry-ve-adult-male-with-sox9-duplication
#13
Nandini Shankara Narayana, Anne-Maree Kean, Lisa Ewans, Thomas Ohnesorg, Katie L Ayers, Geoff Watson, Arthur Vasilaras, Andrew H Sinclair, Stephen M Twigg, David J Handelsman
46,XX disorders of sexual development (DSDs) occur rarely and result from disruptions of the genetic pathways underlying gonadal development and differentiation. We present a case of a young phenotypic male with 46,XX SRY-negative ovotesticular DSD resulting from a duplication upstream of SOX9 presenting with a painful testicular mass resulting from ovulation into an ovotestis. We present a literature review of ovulation in phenotypic men and discuss the role of SRY and SOX9 in testicular development, including the role of SOX9 upstream enhancer region duplication in female-to-male sex reversal...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28601151/effect-of-season-and-age-on-scrotal-circumference-testicular-parameters-and-endocrinological-profiles-in-mithun-bulls
#14
P Perumal, N Savino, C T R Sangma, S Chang, T Z T Sangtam, M H Khan, G Singh, Brijesh Kumar, D Yadav, N Srivastava
Mithun is a domesticated free-range bovine species primarily used as a meat animal and is a pride of North Eastern Hilly regions of India. The present study was conducted to measure the effect of seasons on scrotal & testicular biometrics and endocrinological profiles for different age groups at different seasons in mithun bulls. A total of 30 mithun males were selected from the mithun breeding farm, ICAR-NRC on Mithun, Medziphema, Nagaland, India and were equally distributed into five groups based on their age...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28579417/lesbian-gay-bisexual-transgender-content-on-reproductive-endocrinology-and-infertility-clinic-websites
#15
Harold Y Wu, Ophelia Yin, Brent Monseur, Jessica Selter, Lillian J Collins, Brandyn D Lau, Mindy S Christianson
OBJECTIVE: To assess geographical distribution and practice characteristics of fertility clinics inclusive of lesbian, gay, bisexual, and transgender (LGBT) patients. DESIGN: Cross-sectional analysis. SETTING: Not applicable. PATIENT(S): None. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Prevalence and geographical distribution of fertility clinic websites with LGBT-specific content, indicated by keywords and home page cues specific to the LGBT patient population...
July 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28575556/-endocrinology-of-cancer-and-age-early-and-late-stages-of-ontogenesis
#16
L M Berstein
Processes important for hormone-mediated carcinogenesis are present on different, even very early, ontogenesis stages. Early shifts in hormone-metabolic status often display opposite correlations with the risk of most common age-associated non-communicable pathologies (namely, hormone-dependent cancers and cardiovascular diseases). Additional known contradiction is the raise of reproductive system tumors incidence in the age associated with lower production of mitogenic hormones. Consequently, one should take into account production of steroids in target tissues themselves, recognize the importance of progenotoxic effect, which, apart from mitogenic function, is characteristic for estrogens and their derivatives, as well as the role of endocrine-genotoxic switchings forming so called basic triad, which is born under the influence of age-associated endocrine shifts and environmental factors...
2017: Advances in Gerontology, Uspekhi Gerontologii
https://www.readbyqxmd.com/read/28549062/reproductive-endocrinology-cycling-through-the-menstrual-cycle-an-out-of-body-experience
#17
Donald E Ingber
No abstract text is available yet for this article.
July 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28532840/effect-of-breed-plane-of-nutrition-and-age-on-growth-scrotal-development-metabolite-concentrations-and-on-systemic-gonadotropin-and-testosterone-concentrations-following-a-gnrh-challenge-in-young-dairy-bulls
#18
C J Byrne, S Fair, A M English, C Urh, H Sauerwein, M A Crowe, P Lonergan, D A Kenny
The onset of puberty in the bull is regulated by the timing of early GnRH pulsatility release from the hypothalamus, which has been demonstrated to be affected by plane of nutrition during calf-hood. The aim of this study was to determine the effect of plane of nutrition on growth rate, scrotal development, metabolite concentrations and exogenous gonadotrophin (GnRH) induced release of luteinizing hormone (LH), follicle stimulating hormone (FSH) and testosterone (TT) in pre-pubertal bulls of two contrasting dairy breeds...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28497815/reproductive-endocrinology-puberty-timing-and-cancer-risk
#19
David Holmes
No abstract text is available yet for this article.
July 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
#20
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...
April 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
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