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https://www.readbyqxmd.com/read/29673411/dietary-minerals-reproductive-hormone-levels-and-sporadic-anovulation-associations-in-healthy-women-with-regular-menstrual-cycles
#1
Keewan Kim, Jean Wactawski-Wende, Kara A Michels, Karen C Schliep, Torie C Plowden, Ellen N Chaljub, Sunni L Mumford
Although minerals are linked to several reproductive outcomes, it is unknown whether dietary minerals are associated with ovulatory function. We hypothesised that low intakes of minerals would be associated with an increased risk of anovulation. We investigated associations between dietary mineral intake and both reproductive hormones and anovulation in healthy women in the BioCycle Study, which prospectively followed up 259 regularly menstruating women aged 18-44 years who were not taking mineral supplements for two menstrual cycles...
April 20, 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29626103/role-of-rab5a-in-fshr-mediated-signal-transduction-in-human-granulosa-cells
#2
Kai Zhu, Shang Li, Jiansheng Liu, Yan Hong, Zi-Jiang Chen, Yanzhi Du
Polycystic ovary syndrome, a common condition characterized by endocrine dysfunction, menstrual irregularity, anovulation, and polycystic ovaries, affects 5%-7% of reproductive-age women. RAB5B, which is identified by a genome-wide association study as a risk locus for this syndrome, encodes a small GTPase involved in control of receptor internalization and early endosome fusion. We found that RAB5A mRNA levels in luteinized granulosa cells of obese patients with polycystic ovary syndrome were lower than in those of obese women without the syndrome...
April 6, 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29607594/management-of-the-female-athlete-triad
#3
Sayaka Nose-Ogura, Miyuki Harada, Osamu Hiraike, Yutaka Osuga, Tomoyuki Fujii
The female athlete triad (FAT) is defined by the American College of Sports Medicine (ACSM) as low energy availability (low EA), functional hypothalamic amenorrhoea and osteoporosis. In low EA, lutein dysfunction first develops, followed by anovulation and, subsequently, oligomenorrhea, leading to amenorrhea. Moreover, low estradiol concentrations due to amenorrhea decrease bone mineral density (BMD). In athletes with one of the factors of FAT, the risk of a stress fracture is 2.4-4.9 times higher and may increase the risk of fracture throughout the lifespan...
April 2, 2018: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29595066/follicular-fluid-levels-of-anti-m%C3%A3-llerian-hormone-insulin-like-growth-factor-1-and-leptin-in-women-with-fertility-disorders
#4
Radek Kucera, Vaclav Babuska, Zdenka Ulcova-Gallova, Vlastimil Kulda, Ondrej Topolcan
Anti-Müllerian hormone (AMH), insulin-like growth factor 1 (IGF1) and leptin are produced in the granulosa cells of follicles and play an important role in the growth and maturation of follicles. The aim of our study was to monitor AMH, IGF1 and leptin levels in a group of healthy women and compare them to a group of women with fertility disorders. The second aim was the evaluation of biomarker levels in relation to the identified cause of infertility. Totally, 146 females were enrolled into our study. Seventy-two healthy controls and seventy-four females with fertility disorders were divided into four subgroups: anovulation, endometriosis, fallopian tube damage, unknown reason...
March 29, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29564739/genetic-association-study-from-north-india-to-analyze-association-of-cyp19a1-and-cyp17a1-with-polycystic-ovary-syndrome
#5
Ratneev Kaur, Tajinder Kaur, Anupam Kaur
PURPOSE: Polycystic ovary syndrome (PCOS) is a complex multifactorial endocrine disorder affecting approximately 5-10% of women of reproductive age. Affected women have menstrual disturbances due to anovulation, infertility, and hyperandrogenism. Ovarian androgen overproduction is the key physiopathologic feature of PCOS. A number of genes encoding major enzymes of the androgen metabolic pathways, such as HSD17B6, CYP19A1, CYP11A1, CYP17A1, and INSR, have been examined. Very few studies have been done in North India...
March 22, 2018: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29550643/metabolic-risk-assessment-of-indian-women-with-polycystic-ovarian-syndrome-in-relation-to-four-rotterdam-criteria-based-phenotypes
#6
Priyadarshini Tripathy, Asutosh Sahu, Mahija Sahu, Attila Nagy
OBJECTIVES: Though polycystic ovarian syndrome (PCOS) is associated with multiple metabolic abnormalities, the metabolic risk profile of various PCOS phenotypes is still debated. Here we sought to compare the clinical, biochemical and metabolic parameters among the different PCOS phenotypes and controls. STUDY DESIGN: A total of 394 newly diagnosed PCOS women and 108 controls were enrolled consecutively. PCOS women were divided into four phenotypes based on the presence of two of the following Rotterdam criteria: oligo/anovulation (O), hyperandrogenism (H), and polycystic ovaries (P): A (O + H + P), B (O + H), C (H + P), D (O + P)...
March 1, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29549734/hypothalamic-pituitary-ovarian-axis-perturbation-in-the-basis-of-bisphenol-a-bpa-reproductive-toxicity-in-female-zebrafish-danio-rerio
#7
Ana Molina, Nieves Abril, Noelia Morales-Prieto, José Monterde, Nahúm Ayala, Antonio Lora, Rosario Moyano
Thousands of safety-related studies have been published on bisphenol A (BPA), an ubiquitous environmental pollutant with estrogenic activity and many other potential biological effects. In recent years, BPA exposure has been shown to cause anovulation and infertility through irreversible alteration of the hypothalamic-pituitary-gonadal axis in several organisms, including fish and mammals. Recently, the European Chemical Agency classified BPA as a "substance of very high concern" because of its endocrine-disrupting properties, which have serious effects on human health...
March 14, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29535265/high-level-of-c-type-natriuretic-peptide-induced-by-hyperandrogen-mediated-anovulation-in-polycystic-ovary-syndrome-mice
#8
Xiao Wang, Huarong Wang, Wei Liu, Zhiyuan Zhang, Yanhao Zhang, Wenqiang Zhang, Zijiang Chen, Guoliang Xia, Chao Wang
Polycystic ovary syndrome (PCOS), which is characterized by hyperandrogenism, is a complex endocrinopathy that affects the fertility of 9%-18% of reproductive-age women. However, the exact mechanism of PCOS, especially hyperandrogen-induced anovulation, is largely unknown to date. Physiologically, the natriuretic peptide type C/natriuretic peptide receptor 2 (CNP/NPR2) system is essential for sustaining oocyte meiotic arrest until the preovulatory luteinizing hormone (LH) surge. We therefore hypothesized that the CNP/NPR2 system is also involved in PCOS and contributes to arresting oocyte meiosis and ovulation...
March 13, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29523133/obesity-as-disruptor-of-the-female-fertility
#9
REVIEW
Erica Silvestris, Giovanni de Pergola, Raffaele Rosania, Giuseppe Loverro
Both obesity and overweight are increasing worldwide and have detrimental influences on several human body functions including the reproductive health. In particular, obese women undergo perturbations of the 'hypothalamic pituitary ovarian axis', and frequently suffer of menstrual dysfunction leading to anovulation and infertility. Besides the hormone disorders and subfertility that are common in the polycystic ovary syndrome (PCOS), in obesity the adipocytes act as endocrine organ. The adipose tissue indeed, releases a number of bioactive molecules, namely adipokines, that variably interact with multiple molecular pathways of insulin resistance, inflammation, hypertension, cardiovascular risk, coagulation, and oocyte differentiation and maturation...
March 9, 2018: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/29517358/functional-hypothalamic-amenorrhea-and-its-psychological-correlates-a-controlled-comparison
#10
Ivana Pentz, Sandra Nakić Radoš
OBJECTIVE: The goal of the study was to examine differences between adolescents and young women with functional hypothalamic amenorrhea (FHA) and control groups in personality traits, eating attitudes and behaviours, and perception of parental behaviour. BACKGROUND: The FHA is stress-induced anovulation, both related to metabolic challenges, such as excessive exercise and malnutrition, and psychogenic challenges, such as perfectionism and poor coping strategies...
April 2017: Journal of Reproductive and Infant Psychology
https://www.readbyqxmd.com/read/29510649/the-effects-of-letrozole-and-clomiphene-citrate-on-ligands-expression-of-wnt3-wnt7a-and-wnt8b-in-proliferative-endometrium-of-women-with-polycystic-ovarian-syndrome
#11
Shayesteh Mehdinejadiani, Fardin Amidi, Mehdi Mehdizadeh, Mahmood Barati, Leili Safdarian, Reza Aflatoonian, Ashraf Alyasin, Marzieh Aghahosseini, Azar Pazhohan, Parisa Hayat, Farzaneh Mohammadzadeh Kazorgah, Aligholi Sobhani
Polycystic ovarian syndrome (PCOS) is a common endocrinologic disorder in women of reproductive age characterized by polycystic ovaries, oligo/anovulation, and hyperandrogenism. Not only anovulation but also endometrial dysfunction can reduce fertility in PCOS patients. Wnt pathway is responsible for endometrial proliferation which be strongly regulated by estradiol. To determine the effects of clomiphene citrate (CC) and letrozole, we measured the expression of some main ligands of Wnt/β-catenin signaling including Wnt7a, Wnt3, and Wnt8b in the endometrial samples taken from PCOS women on day 12 of the menses who received 100 mg CC or 5 mg letrozole as well as from women without treatment...
March 6, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29471436/antiandrogen-treatment-ameliorates-reproductive-and-metabolic-phenotypes-in-the-letrozole-induced-mouse-model-of-pcos
#12
Genevieve E Ryan, Shaddy Malik, Pamela L Mellon
Polycystic ovary syndrome (PCOS), the most common endocrinopathy in women of reproductive age, is characterized by hyperandrogenism, anovulation, and polycystic ovaries. Although its etiology is unknown, excess androgens are thought to be a critical factor driving the pathology of PCOS. We previously demonstrated that continuous exposure to the aromatase inhibitor letrozole (LET) in mice produces many hallmarks of PCOS, including elevated testosterone (T) and luteinizing hormone, anovulation, and obesity. In the current study, we sought to determine whether androgen receptor (AR) actions are responsible for any of the phenotypes observed in LET mice...
April 1, 2018: Endocrinology
https://www.readbyqxmd.com/read/29463075/adverse-effects-of-doping-with-anabolic-androgenic-steroids-aas-in-competitive-athletics-recreational-sports-and-bodybuilding
#13
Elena Vorona, Eberhard Nieschlag
Despite the fact that sports organizations and legislators have introduced various mechanisms to discourage athletes from using performance and appearance enhancing substances a high percentage of athletes admits to their unabated application. In competitive athletics, bodybuilding and in recreational sports anabolic androgenic steroids (AAS) continue to be the substances most abused. This review summarizes the side effects of AAS abuse on organs and system functions in both sexes. High doses of AAS cause a significant increase of erythrocytes und haemoglobin concentration, which may lead to thromboembolism, intracardiac thrombosis and stroke...
February 19, 2018: Minerva Endocrinologica
https://www.readbyqxmd.com/read/29462707/the-diagnostic-value-of-anti-mullerian-hormone-in-early-post-menarche-adolescent-girls-with-polycystic-ovarian-syndrome
#14
Pınar Kocaay, Zeynep Siklar, Sema Buyukfirat, Merih Berberoglu
STUDY OBJECTIVE: Polycystic ovarian syndrome (PCOS) is a common endocrine disorder characterized by hyperandrogenism and chronic anovulation, which affects 5-10% of reproductive age females. Diagnosis of adult patients with PCOS is made easily with clinical and laboratory methods and the antimullerian hormone (AMH) level are accepted as a good indicator. However, there is still no complete consensus on the diagnosis of PCOS in adolescents. DESIGN: and Settings: Prospective cohort study, December 2013 to November 2014 PARTICIPANTS: The study was conducted on adolescent girls with oligomenorrhea, with at least two years since menarche...
February 17, 2018: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/29435121/lipidomics-reveals-altered-biosynthetic-pathways-of-glycerophospholipids-and-cell-signaling-as-biomarkers-of-the-polycystic-ovary-syndrome
#15
Mariona Jové, Irene Pradas, Alba Naudí, Susana Rovira-Llopis, Celia Bañuls, Milagros Rocha, Manuel Portero-Otin, Antonio Hernández-Mijares, Victor M Victor, Reinald Pamplona
Purpose: In this work, a non-targeted approach was used to unravel changes in the plasma lipidome of PCOS patients. The aim is to offer new insights in PCOS patients strictly selected in order to avoid confounding factors such as dyslipemia, obesity, altered glucose/insulin metabolism, cardiovascular disease, or cancer. Results: Multivariate statistics revealed a specific lipidomic signature for PCOS patients without associated pathologies. This signature implies changes, mainly by down-regulation, in glycerolipid, glycerophospholipid and sphingolipid metabolism suggesting an altered biosynthetic pathway of glycerophospholipids and cell signaling as second messengers in women with PCOS...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29434814/metformin-and-pioglitazone-combination-therapy-ameliorate-polycystic-ovary-syndrome-through-ampk-pi3k-jnk-pathway
#16
Yuanyuan Wu, Pengfen Li, Dan Zhang, Yingpu Sun
Polycystic ovary syndrome (PCOS) is a common gynecological endocrine disorder, which results in health problems such as menstrual disorders, hyperandrogenism and persistent anovulation. Hyperandrogenism and insulin resistance are the basic characteristics of PCOS. To investigate the combined effect of metformin and pioglitazone on POCS and the potential mechanisms, a rat model of PCOS was established by intramuscular injection of estradiol valerate (EV). The effect of metformin and pioglitazone monotherapy or combination therapy in control rats and PCOS rats was evaluated, involving the testosterone level, follicular development and insulin resistance...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29428315/association-of-testosterone-and-antim%C3%A3-llerian-hormone-with-time-to-pregnancy-and-pregnancy-loss-in-fecund-women-attempting-pregnancy
#17
Lindsey A Sjaarda, Sunni L Mumford, Daniel L Kuhr, Tiffany L Holland, Robert M Silver, Torie C Plowden, Neil J Perkins, Enrique F Schisterman
OBJECTIVE: To examine whether higher T and/or antimüllerian hormone (AMH) was associated with anovulation, time to pregnancy (TTP), or pregnancy loss risk among healthy, fecund women without diagnosed polycystic ovary syndrome. DESIGN: Prospective cohort study conducted as a secondary analysis from the Effects of Aspirin in Gestation and Reproduction randomized trial. SETTING: University medical centers. PATIENT(S): A total of 1,198 healthy, eumenorrheic women aged 18-40 years attempting spontaneous pregnancy with one to two prior pregnancy losses were included...
February 7, 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29426356/the-correlation-between-serum-amh-and-homa-ir-among-pcos-phenotypes
#18
Budi Wiweko, Indra Indra, Cynthia Susanto, Muharam Natadisastra, Andon Hestiantoro
BACKGROUND: Polycystic ovarian syndrome (PCOS) is known to be one of the most prevalent endocrine disorders affecting reproductive age women. One of the endocrine disorder is hyperinsulinemia, which corresponds with the severity of PCOS. However, the pathogenesis of PCOS is not fully understood, but one theory of anti-mullerian hormone (AMH) has been proposed as one of the factor related to the degree of severity of PCOS. However, there are no clear correlation between levels of AMH with the incidence of insulin resistance in PCOS patients especially in Indonesia...
February 9, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29334661/altered-expression-of-il-1%C3%AE-il-1ri-il-1rii-il-1ra-and-il-4-could-contribute-to-anovulation-and-follicular-persistence-in-cattle
#19
A F Stassi, M E Baravalle, E M Belotti, A N Amweg, E Angeli, M M L Velázquez, F Rey, N R Salvetti, H H Ortega
Cystic ovarian disease (COD) is an important cause of infertility in dairy cattle. The main signs of this infertility are ovulation failure and follicular persistence. The aim of this study was to examine the expression of the cytokines IL-1β, IL-1RI, IL-1RII, IL-1RA and IL-4 in ovarian follicular structures at different times of persistence in a model of follicular persistence induced by prolonged administration of progesterone in dairy cows. Protein expression of IL-1β, IL-1RI, IL-1RII, IL-1RA and IL-4 was evaluated by immunohistochemistry...
April 1, 2018: Theriogenology
https://www.readbyqxmd.com/read/29317123/c-reactive-protein-in-relation-to-fecundability-and-anovulation-among-eumenorrheic-women
#20
Rose G Radin, Lindsey A Sjaarda, Robert M Silver, Carrie J Nobles, Sunni L Mumford, Neil J Perkins, Brian D Wilcox, Anna Z Pollack, Karen C Schliep, Torie C Plowden, Enrique F Schisterman
OBJECTIVE: To assess systemic inflammation in relation to fecundability and anovulation. DESIGN: Prospective cohort study among participants in the Effects of Aspirin in Gestation and Reproduction trial who were assigned to the placebo. SETTING: Academic medical centers. PATIENT(S): Healthy eumenorrheic women (n = 572), 18-40 years of age, with one or two pregnancy losses, attempting spontaneous pregnancy. INTERVENTION(S): Baseline serum high-sensitivity C-reactive protein (hsCRP) values <10 mg/L were categorized into tertiles...
February 2018: Fertility and Sterility
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