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https://www.readbyqxmd.com/read/28292619/obesity-and-female-infertility-potential-mediators-of-obesity-s-impact
#1
REVIEW
Darcy E Broughton, Kelle H Moley
The worldwide upward trend in obesity has been dramatic, now affecting more than 20% of American women of reproductive age. Obesity is associated with many adverse maternal and fetal effects prenatally, but it also exerts a negative influence on female fertility. Obese women are more likely to have ovulatory dysfunction due to dysregulation of the hypothalamic-pituitary-ovarian axis. Women with polycystic ovarian syndrome who are also obese demonstrate a more severe metabolic and reproductive phenotype. Obese women have reduced fecundity even when eumenorrheic and demonstrate poorer outcomes with the use of in vitro fertilization...
March 11, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28273958/comparative-study-on-the-estimation-of-estrous-cycle-in-mice-by-visual-and-vaginal-lavage-method
#2
Gnanagurudasan Ekambaram, Senthil Kumar Sampath Kumar, Leena Dennis Joseph
INTRODUCTION: Evaluation of estrous cycle in laboratory animals can be a useful measure of the integrity of hypothalamic-pituitary-ovarian reproductive axis. Assessment of vaginal cytology is crucial to assess the milieu and compare the endocrine status of animals among the experimental groups. AIM: The present study was attempted to compare the estimation of estrous cycle by visual method and non invasive vaginal lavage method. MATERIALS AND METHODS: Sixty healthy female swiss albino mice were used for the present study...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28240193/crh-receptors-in-human-reproduction
#3
Antonis Makrigiannakis, Thomas Vrekoussis, Emmanouel Zoumakis, Iordanis Navrozoglou, Sophia Kalantaridou
Corticotropin releasing hormone (CRH), the main peptide-mediator of stress, has been found in the female reproductive system. Herein, the role of CRH receptors in the female reproductive sysem is presented. It is clear that CRH receptors are involved in the regulation of the hypothalamic-pituitary-ovarian axis, while locally are associated with decidualization, embryonic implantation, early fetal development and triggering of parturition. Abnormal CRH signalling may contribute to obstetrical pathophysiology, such as pre-eclampsia, abnormal placenta invasion, endometrial growth retardation and preterm delivery...
February 23, 2017: Current Molecular Pharmacology
https://www.readbyqxmd.com/read/28183310/animal-models-of-hyperandrogenism-and-ovarian-morphology-changes-as-features-of-polycystic-ovary-syndrome-a-systematic-review
#4
REVIEW
Larissa Paixão, Ramon B Ramos, Anita Lavarda, Debora M Morsh, Poli Mara Spritzer
Polycystic ovary syndrome (PCOS) is a common endocrine disorder, affecting 9-18% of women in reproductive age that causes hyperandrogenism and infertility due to dysfunctional follicular maturation and anovulation. The etiology of PCOS is still poorly known, and information from experimental animal models may help improve current understanding of the mechanisms of PCOS initiation and development. Therefore, we conducted a systematic review of currently available methods for simulation of PCOS in experimental models, focusing on two main endocrine traits: ovarian morphology changes and circulating levels of sex hormones and gonadotropins...
February 10, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28107821/effects-of-a-single-20%C3%A2-mg-dose-of-letrozole-on-ovarian-function-post-dominant-follicle-selection-an-exploratory-randomized-controlled-trial
#5
H C M Allaway, D R Chizen, G P Adams, R A Pierson
BACKGROUND: Our objective was to explore the impact of a single dose of an aromatase inhibitor (letrozole) administered at defined times of the follicular phase or immediately after ovulation on dominant follicle development, luteogenesis and new follicle wave emergence. METHODS: A prospective pilot study using a randomized complete block, controlled, open label design was conducted at an academic clinical research center. Forty-five healthy, female volunteers (25...
January 21, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/27903446/polycystic-ovary-syndrome-an-under-recognized-cause-of-abnormal-uterine-bleeding-in-adolescents-admitted-to-a-children-s-hospital
#6
Sofya Maslyanskaya, Hina J Talib, Jennifer L Northridge, Amanda M Jacobs, Chanelle Coble, Susan M Coupey
STUDY OBJECTIVE: To evaluate whether ovulatory dysfunction due to polycystic ovary syndrome (PCOS) is a common underlying etiology of abnormal uterine bleeding (AUB) in adolescents who require hospitalization and to explore etiology, treatment, and complications of AUB with severe anemia in adolescents. DESIGN, SETTING, PARTICIPANTS, INTERVENTIONS, AND MAIN OUTCOME MEASURES: We identified female patients aged 8-20 years admitted to a children's hospital for treatment of AUB from January 2000 to December 2014...
November 27, 2016: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/27866938/ovulation-induction-in-polycystic-ovary-syndrome-current-options
#7
REVIEW
Richard S Legro
There are a variety of effective treatment options to induce ovulation in women with polycystic ovary syndrome (PCOS). The most effective treatments are primarily reproductive and target the hypothalamic-pituitary-ovarian (HPO) axis. Letrozole, an aromatase inhibitor, is headed toward replacing clomiphene, a selective estrogen receptor modulator, as the first-choice option. Metabolic treatments likely work indirectly through the HPO axis. Many metabolic treatments have shown initial promise and later failed (troglitozone or d-chiro-inositol) or disappointed (metformin); further studies are needed of newer agents to treat type 2 diabetes...
November 2016: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27787478/dysfunctional-uterine-bleeding-as-an-early-sign-of-polycystic-ovary-syndrome-during-adolescence-an-update
#8
Efthimios Deligeoroglou, Vasileios Karountzos
AIM: Abnormal Uterine Bleeding (AUB) is a frequent reason for concern between adolescents. The most common cause of AUB in these girls, when other pathologies have been excluded, is Dysfunctional Uterine Bleeding (DUB). The aim of this review is to assess the role of DUB as an early symptom of Polycystic Ovarian Syndrome (PCOS) diagnosis later in life. METHODS: Review of the literature, using Pubmed and Medline as primary databases, regarding the correlation between DUB cases early after menarche and PCOS diagnosis in the future...
October 27, 2016: Minerva Ginecologica
https://www.readbyqxmd.com/read/27749734/aging-ovary-and-the-role-for-advanced-glycation-end-products
#9
Magdalena Pertynska-Marczewska, Evanthia Diamanti-Kandarakis
OBJECTIVE: The hypothalamic gonadotropin-releasing hormone pulse generator, the pituitary gonadotropes, the ovaries, and the uterus play a crucial role in female fertility. A decline in reproductive performance represents a complex interplay of actions at all levels of the hypothalamic-pituitary-ovarian axis. Recently, in the field of female reproductive aging attention is drawn to the carbonyl stress theory. Advanced glycation end products (AGEs) contribute directly to protein damage, induce a chain of oxidative stress (OS) reactions, and increase inflammatory reactions...
October 3, 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27721027/the-utility-of-routine-ultrasound-in-the-diagnosis-and-management-of-adolescents-with-abnormal-uterine-bleeding
#10
Yael Pecchioli, Lamide Oyewumi, Lisa M Allen, Sari Kives
STUDY OBJECTIVE: Despite the fact that most cases of abnormal uterine bleeding (AUB) in adolescence are due to an immature hypothalamic-pituitary-ovarian (HPO) axis, the current approach to investigating adolescents who present with AUB often includes pelvic ultrasound to exclude rare structural causes. The aim of this study was to determine whether an ultrasound ordered for the investigation of AUB in adolescents detects any significant anatomic pathology or alters diagnosis and management...
October 6, 2016: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/27693042/a-summary-of-the-influence-of-exogenous-estrogen-administration-across-the-lifespan-on-the-gh-igf-1-axis-and-implications-for-bone-health
#11
Emily A Southmayd, Mary Jane De Souza
Bone growth, development, and remodeling are modulated by numerous circulating hormones. Throughout the lifespan, the extent to which each of the hormones impacts bone differs. Understanding the independent and combined impact of these hormones on controlling bone remodeling allows for the development of more informed decision making regarding pharmacology, specifically the use of hormonal medication, at all ages. Endocrine control of bone health in women is largely dictated by the growth hormone (GH)/insulin-like growth factor-1 (IGF-1) axis and the hypothalamic-pituitary-ovarian (HPO) axis...
September 13, 2016: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/27621248/smoking-alcohol-and-caffeine-in-relation-to-two-hormonal-indicators-of-ovarian-age-during-the-reproductive-years
#12
J Kline, A Tang, B Levin
OBJECTIVE: To examine whether or not cigarette smoking, alcohol and caffeine intake are related to two indicators of ovarian age-anti-Müllerian hormone (AMH) and follicle stimulating hormone (FSH). STUDY DESIGN: Cross-sectional study of 477 women with a recent index spontaneous abortion (SA) (105 trisomic, 93 non-trisomic) or livebirth (LB) (279) with hormones measured on days 2-4 of an apparently normal menstrual cycle after the index pregnancy. RESULTS: Current smoking is associated with about a 15% increase in median FSH (β for ln(FSH)=0...
October 2016: Maturitas
https://www.readbyqxmd.com/read/27506801/endocrine-disorders-in-women-with-complex-regional-pain-syndrome-type-i
#13
A Buryanov, A Kostrub, V Kotiuk
BACKGROUND: The question of hormonal dysregulation in patients with CRPS I in whole was investigated very scantily. There are only a few studies concerning catecholamines, oestrogens and endorphins independently. Other hormones were studied in patients with different other chronic pain conditions. Considering the accumulation of sufficient knowledge about the role of disadaptation processes in CRPS I pathogenesis and the role of the hypothalamic-pituitary-adrenal and hypothalamic-pituitary-ovarian systems in the process of adaptation it was logical and consistent to define the role of hormonal dysregulation of these systems in patients with CRPS I...
February 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/27405655/di-2-ethylhexyl-phthalate-impairs-steroidogenesis-in-ovarian-follicular-cells-of-prepuberal-mice
#14
Fang-Nong Lai, Jing-Cai Liu, Lan Li, Jun-Yu Ma, Xue-Lian Liu, Yu-Ping Liu, Xi-Feng Zhang, Hong Chen, Massimo De Felici, Paul W Dyce, Wei Shen
Di (2-ethylhexyl) phthalate (DEHP) is a plasticizer which is widely used in the manufacture of plastics. As a common environmental contaminant and recognized endocrine disrupting chemical, DEHP is able to deregulate the functions of a variety of tissues, including the reproductive system both in males and females. In order to investigate the possible effects of DEHP on the first wave of folliculogenesis, occurring in the mouse ovary postnatally, mice were administered 20 or 40 μg/kg DEHP through intraperitoneal injection at days 5, 10 and 15 post partum (dpp)...
March 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/27405252/impact-of-food-restriction-on-the-expression-of-the-adiponectin-system-and-genes-in-the-hypothalamic-pituitary-ovarian-axis-of-pre-pubertal-ewes
#15
R Wang, M Kuang, H Nie, W Bai, L Sun, F Wang, D Mao, Z Wang
Adiponectin, a cytokine secreted typically by adipocytes, has been implicated as a molecular switch between female reproduction and energy balance. The present study was undertaken to investigate the expression of adiponectin system and patterns of genes in the hypothalamic-pituitary-ovary (HPO) axis of food-restricted pre-pubertal ewes. Eighteen 2-month-old female ewes were assigned to 3 groups after a pre-feeding ad libitum for 10 days (six in each group): the control group (C), the low-food-restricted group (LR) and the high-food-restricted group (HR), which were fed with 100%, 70% and 50% of ad libitum food intake, respectively...
October 2016: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/27382208/effect-of-ubiquinol-on-serum-reproductive-hormones-of-amenorrhic-patients
#16
A S Thakur, G P Littaru, I Funahashi, U S Painkara, N S Dange, P Chauhan
In neuroendocrine system the increase in oxidative status is produced by a glucocorticoid-dependent and transcriptional increase in pro-oxidative drive, with concurrent inhibition of the antioxidant defense system, ultimately leading to increased neuronal cell death. Functional hypothalamic disturbances and neuroendocirne aberrations have both short and long term consequences for reproductive health. Understandably, an impaired or diminished hypothalamic-pituitary-ovarian axis leads to anovulation and hypoestrogenism...
July 2016: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/27364226/beyond-the-brain-peripheral-kisspeptin-signaling-is-essential-for-promoting-endometrial-gland-development-and-function
#17
Silvia León, Daniela Fernadois, Alexandra Sull, Judith Sull, Michele Calder, Kanako Hayashi, Moshmi Bhattacharya, Stephen Power, George A Vilos, Angelos G Vilos, Manuel Tena-Sempere, Andy V Babwah
Uterine growth and endometrial gland formation (adenogenesis) and function, are essential for fertility and are controlled by estrogens and other regulators, whose nature and physiological relevance are yet to be elucidated. Kisspeptin, which signals via Kiss1r, is essential for fertility, primarily through its central control of the hypothalamic-pituitary-ovarian axis, but also likely through peripheral actions. Using genetically modified mice, we addressed the contributions of central and peripheral kisspeptin signaling in regulating uterine growth and adenogenesis...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27354844/marijuana-the-endocannabinoid-system-and-the-female-reproductive-system
#18
REVIEW
Lisa K Brents
Marijuana use among women is highly prevalent, but the societal conversation on marijuana rarely focuses on how marijuana affects female reproduction and endocrinology. This article reviews the current scientific literature regarding marijuana use and hypothalamic-pituitary-ovarian (HPO) axis regulation, ovarian hormone production, the menstrual cycle, and fertility. Evidence suggests that marijuana can reduce female fertility by disrupting hypothalamic release of gonadotropin releasing hormone (GnRH), leading to reduced estrogen and progesterone production and anovulatory menstrual cycles...
June 2016: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/27241968/polycystic-ovary-syndrome-in-adolescents
#19
REVIEW
Selma Feldman Witchel, Hailey Roumimper, Sharon Oberfield
Polycystic ovary syndrome (PCOS) is a familial heterogeneous disorder affecting 6% to 10% of reproductive-age women. The use of criteria developed for adult women is problematic for the adolescent girl because the clinical features associated with PCOS are normal pubertal events. The recent consensus statement on PCOS in adolescents stated that hyperandrogenism and oligomenorrhea need to persist for at least 2 years to consider the diagnosis of PCOS. Although insulin resistance, hyperinsulinism, and obesity are often associated with PCOS, these features are not considered valid diagnostic criteria...
June 2016: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/27187064/corpus-luteum-as-a-novel-target-of-weight-changes-that-contribute-to-impaired-female-reproductive-physiology-and-function
#20
Satu Kuokkanen, Alex J Polotsky, Justin Chosich, Andrew P Bradford, Anna Jasinska, Tzu Phang, Nanette Santoro, Susan E Appt
UNLABELLED: Obesity and malnutrition are associated with decreased fecundity in women. Impaired reproductive capacity in obese women is often attributed to anovulation. However, obese women with ovulatory cycles also have reduced fertility, but the etiology of their impaired reproduction is only partially understood. Accumulating evidence suggests that obesity directly impairs oocyte and embryo quality as well as endometrial receptivity. In obese women, urinary progesterone metabolite excretion is decreased, but in excess of what can be explained by suppressed gonadotropin secretion, suggesting that apart from its central effect obesity may directly affect progesterone (P4) production...
August 2016: Systems Biology in Reproductive Medicine
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