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https://www.readbyqxmd.com/read/29675488/trans-dermal-estrogen-oestrogel-for-endometrial-preparation-in-freeze-embryo-transfer-cycle-an-rct
#1
Ensieh Shahrokh Tehraninejad, Roya Kabodmehri, Batol Hosein Rashidi, Mina Jafarabadi, Fateme Keikha, Masomeh Masomi, Fedieh Hagholahi
Background: Estrogen and progesterone are two crucial factors for endometrial preparation in frozen embryo transfer (FET) cycles. Studies assessing different forms of estradiol in FET have published already but literature lacks enough surveys on transdermal estrogen application in reproductive medicine. Objective: To investigate the effects of trans dermal estrogen (Oestrogel) on pregnancy rates in patients that candidate for FET cycle. Materials and Methods: In this randomized clinical trial, 100 women undergoing FET cycles referred to Imam Khomeeini Hospital were enrolled in two groups, randomly...
January 2018: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/29675483/fresh-versus-frozen-embryo-transfer-after-gonadotropin-releasing-hormone-agonist-trigger-in-gonadotropin-releasing-hormone-antagonist-cycles-among-high-responder-women-a-randomized-multi-center-study
#2
Abbas Aflatoonian, Mahnaz Mansoori-Torshizi, Maryam Farid Mojtahedi, Behrouz Aflatoonian, Mohammaad Ali Khalili, Mohammad Hossein Amir-Arjmand, Mehrdad Soleimani, Nastaran Aflatoonian, Homa Oskouian, Nasim Tabibnejad, Peter Humaidan
Background: The use of embryo cryopreservation excludes the possible detrimental effects of ovarian stimulation on the endometrium, and higher reproductive outcomes following this policy have been reported. Moreover, gonadotropin-releasing hormone agonist trigger in gonadotropin-releasing hormone (GnRH) antagonist cycles as a substitute for standard human chorionic gonadotropin trigger, minimizes the risk of ovarian hyperstimulation syndrome (OHSS) in fresh as well as frozen embryo transfer cycles (FET)...
January 2018: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/29674281/effects-of-tocotrienol-from-bixa-orellana-annatto-on-bone-histomorphometry-in-a-male-osteoporosis-model-induced-by-buserelin
#3
Nur-Vaizura Mohamad, Ima-Nirwana Soelaiman, Kok-Yong Chin
INTRODUCTION: Osteoporosis is a debilitating skeletal side effect of androgen deprivation therapy based on gonadotropin-releasing hormone (GnRH) agonist in men. Tocotrienol from Bixa orellana (annatto) has been demonstrated to offer protection against osteoporosis by exerting anabolic effects on bone. Thus, it may prevent osteoporosis among GnRH agonist users. OBJECTIVE: This study aimed to determine the effectiveness of annatto-tocotrienol on the bone turnover markers and bone histomorphometry in a model of male osteoporosis induced by buserelin (a GnRH agonist)...
April 16, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29673944/liver-disease-in-men-undergoing-androgen-deprivation-therapy-for-prostate-cancer
#4
Philipp Gild, Alexander P Cole, Anna Krasnova, Barbra A Dickerman, Nicolas von Landenberg, Maxine Sun, Lorelei A Mucci, Stuart R Lipsitz, Felix K-H Chun, Paul L Nguyen, Adam S Kibel, Toni K Choueiri, Shehzad Basaria, Quoc-Dien Trinh
PURPOSE: Androgen deprivation therapy is associated with development of diabetes and metabolic syndrome. Its effect on developing non-alcoholic fatty liver disease, a condition frequently co-occuring with metabolic syndrome, and other subsequent liver conditions (liver cirrhosis, hepatic necrosis, any liver disease) has not been investigated.
 MATERIALS & METHODS: We identified 82,938 men aged 66 and older diagnosed with localized prostate cancer within the Surveillance, Epidemiology and End Results- Medicare database, 1992-2009...
April 16, 2018: Journal of Urology
https://www.readbyqxmd.com/read/29671415/phoenixin-uncovering-its-receptor-signaling-and-functions
#5
REVIEW
Emma K McIlwraith, Denise D Belsham
Phoenixin (PNX) is a newly discovered peptide that has been linked to reproductive function, both in the hypothalamus and pituitary. This review will focus on the most recent discoveries related to this novel neuropeptide. Initially, it was found that PNX increased gonadotropin releasing hormone (GnRH)-stimulated luteinizing hormone (LH) release from pituitary cells. Importantly, knockdown of PNX in female rats extended the estrous cycle by 2.3 days. Using novel hypothalamic cell lines, we found that PNX has a stimulatory role on kisspeptin (Kiss) and GnRH gene expression and secretion...
April 19, 2018: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/29670580/the-roles-of-kisspeptin-system-in-the-reproductive-physiology-of-fish-with-special-reference-to-chub-mackerel-studies-as-main-axis
#6
REVIEW
Hirofumi Ohga, Sethu Selvaraj, Michiya Matsuyama
Kisspeptin, a novel neuropeptide product of the Kiss1 gene, activates the G protein-coupled membrane receptor G protein-coupled receptor 54 (now termed Kiss1r). Over the last 15 years, the importance of the kisspeptin system has been the subject of much debate in the mammalian research field. At the heart of the debate is whether kisspeptin is an absolute upstream regulator of gonadotropin-releasing hormone secretion, as it has been proposed to be the master molecule in reproductive events and plays a special role not only during puberty but also in adulthood...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29670579/editorial-gonadotropin-releasing-hormone-receptor-signaling-and-functions
#7
EDITORIAL
Ivana Bjelobaba, Stanko S Stojilkovic, Zvi Naor
No abstract text is available yet for this article.
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29669934/divergent-responses-to-kisspeptin-in-children-with-delayed-puberty
#8
Yee-Ming Chan, Margaret F Lippincott, Temitope O Kusa, Stephanie B Seminara
BACKGROUND: The neuropeptide kisspeptin stimulates luteinizing hormone (LH) secretion in healthy adults but not in adults with idiopathic hypogonadotropic hypogonadism. We hypothesized that, in children presenting with delayed or stalled puberty, kisspeptin would elicit LH secretion in those children found on detailed nighttime neuroendocrine profiling to have evidence of emerging reproductive endocrine function. METHODS: Eleven boys and four girls were admitted overnight to assess LH secretion at baseline, after a single intravenous bolus of kisspeptin, and after a single intravenous bolus of gonadotropin-releasing hormone (GnRH)...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29669803/growth-hormone-in-combination-with-leuprorelin-in-pubertal-children-with-idiopathic-short-stature
#9
Imane Benabbad, Myriam Rosilio, Maithe Tauber, Emmanuel Paris, Anne Fjellestad-Paulsen, Lovisa Berggren, Hiren Patel, Jean-Claude Carel
OBJECTIVE: There is a scarcity of data from randomised controlled trials on the association of growth hormone (GH) with gonadotrophin-releasing hormone (GnRH) agonists in idiopathic short stature (ISS), although this off-label use is common. We aimed to test whether delaying pubertal progression could increase near-adult height (NAH) in GH-treated patients with ISS. METHODS: Patients with ISS at puberty onset were randomised to GH with leuprorelin (combination, n=46) or GH alone (n=45)...
April 18, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29669074/prostaglandin-f2%C3%AE-7-d-prior-to-initiation-of-the-7-d-co-synch-cidr-protocol-failed-to-enhance-estrus-response-and-pregnancy-rates-in-beef-heifers
#10
Nicola Oosthuizen, Luara B Canal, Pedro L P Fontes, Carla D Sanford, Nicolas DiLorenzo, Carl R Dahlen, George E Seidel, G Cliff Lamb
To determine the effects of administration of 25 mg of PGF2α 7 d prior to the initiation of the 7-d CO-Synch + controlled internal drug release (CIDR) fixed-time AI (TAI) protocol, 985 Bos taurus beef heifers were enrolled in a completely randomized design at 9 locations from April to July of 2016. Within location, all heifers were randomly assigned to 1 of 2 treatments: 1) CONTROL (n = 496); 100 µg injection of GnRH and a CIDR insert for 7 d [day 7], administration of 25 mg of PGF2α at CIDR removal [day 0], followed by a second injection of GnRH and TAI 54 ± 2 h later; or 2) PRESYNCH (n = 489); same as CONTROL but heifers received an additional injection of 25 mg of PGF2α 7 d prior [day 14] to CIDR insertion...
April 14, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29667856/low-oxygen-environment-facilitates-embryo-availability-for-older-ovarian-responders-pors
#11
Mingzhao Li, Zhibin Li, Juanzi Shi
We aimed to investigate the different effects of low oxygen (5% O2 ) and atmospheric oxygen (20% O2 ) on in vitro fertilization for older poor ovarian responders (PORs). We selected 1080 older PORs who met two criteria: (i) advanced maternal age (≥40) and (ii) an abnormal ovarian reserve test. All the patients used the ultra-short term protocols with GnRH agonist and recombinant FSH for controlled ovarian hyperstimulation (COH). About 506 cycles were performed in the incubators with 5% O2 and 574 cycles were performed in the incubators with 20% O2 ...
April 18, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29664792/added-value-today-of-hormonal-measurements-in-ovarian-stimulation-in-gonadotropin-releasing-hormone-antagonist-treatment-cycle
#12
Biljana Popovic-Todorovic, Annalisa Racca, Christophe Blockeel
PURPOSE OF REVIEW: Traditional approach of ovarian stimulation monitoring for in-vitro fertilization involves transvaginal sonography and serum estradiol measurements. Accumulating evidence has shown that hormonal evaluations during ovarian stimulation allow individual cycle optimization, moving away from only predicting the risk of ovarian hyperstimulation syndrome, but in addition assessing the impact of ovarian stimulation on endometrial receptivity, quality of oocytes, and subsequently embryos...
April 16, 2018: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29660734/interpretation-of-serum-gonadotropin-levels-in-hyperprolactinemia
#13
Ali Abbara, Sophie A Clarke, Alexander Nesbitt, Sabreen Ali, Alexander N Comninos, Emma Hatfield, Niamh Martin, Amir Sam, Karim Meeran, Waljit S Dhillo
<br>Background/Aims: Hyperprolactinemia is a common cause of amenorrhea due to hypogonadotropic hypogonadism. Prolactin is hypothesized to impede the reproductive axis through an inhibitory action at the hypothalamus. However, limited data exists to aid the interpretation of serum gonadotropins in the context of hyperprolactinemia. METHODS: Serum gonadotropin values were reviewed in 243 patients with elevated serum monomeric prolactin due to discrete etiologies at a tertiary reproductive endocrine centre between 2012 and 2015...
April 16, 2018: Neuroendocrinology
https://www.readbyqxmd.com/read/29658351/high-estrogen-exposure-may-not-be-detrimental-on-endometrial-receptivity-in-women-with-pcos
#14
Cigdem Abide Yayla, Enis Ozkaya, Gulay Beydilli Nacak, Ilhan Sanverdi, Belgin Devranoglu, Evrim Bostanci Ergen, Cetin Kilicci, Tayfun Kutlu
The study aimed to assess the effect of high estrogen exposure and coasting on cycle outcome in women at risk for developing ovarian hyperstimulation syndrome (OHSS). Retrospective case-control study was conducted to figure out the outcomes of GnRH antagonist cycles in which women were at risk to develop OHSS. Women who underwent coasting (n = 100) were compared with a control group of women who did not undergo coasting (n = 287). Effect of endometrial estrogen exposure was determined by calculating area under curve of temporal estrogen measurements (AUCEM) through the cycle...
April 14, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29656769/population-control-in-small-animals
#15
REVIEW
Margaret V Root Kustritz
Optimal age for ovariohysterectomy or castration has not been defined in the scientific literature. Bitches and queens are significantly less likely to develop mammary neoplasia, which has a high incidence and potentially high morbidity and mortality, if spayed when young. Tom cats exhibit undesirable behaviors that preclude them being good pets and should be castrated young. There is no compelling reason to castrate male dogs when young unless it is needed to control reproductive behaviors or prevent indiscriminate breeding...
April 12, 2018: Veterinary Clinics of North America. Small Animal Practice
https://www.readbyqxmd.com/read/29656508/the-3-rd-world-conference-on-kisspeptin-kisspeptin-2017-brain-and-beyond-unresolved-questions-challenges-and-future-directions-for-the-field
#16
REVIEW
Michael N Lehman, Lique M Coolen, Robert A Steiner, Genevieve Neal-Perry, Luhong Wang, Suzanne M Moenter, Aleisha M Moore, Robert L Goodman, Shel Hwa-Yeo, Stephanie L Padilla, Alexander S Kauffman, James Garcia, Martin J Kelly, Jenny Clarkson, Sally Radovick, Andy V Babwah, Silvia Leon, Manuel Tena-Sempere, Alex Comninos, Stephanie Seminara, Waljit S Dhillo, Jon Levine, Ei Terasawa, Ariel Negron, Allan E Herbison
The 3rd World Conference on Kisspeptin, "Kisspeptin 2017: Brain and Beyond" was held March 30-31 at the Rosen Centre Hotel in Orlando, Florida, providing an international forum for multidisciplinary scientists to meet and share cutting-edge research on kisspeptin biology and its relevance to human health and disease. The meeting built upon previous world conferences focused on the role of kisspeptin and associated peptides in the control of gonadotropin-releasing hormone (GnRH) secretion and reproduction...
April 14, 2018: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29656045/distribution-and-morphology-of-gonadotropin-releasing-hormone-neurons-in-the-hypothalamus-of-an-induced-ovulator-the-llama-lama-glama
#17
Rodrigo A Carrasco, Jaswant Singh, Gregg P Adams
Gonadotropin-releasing hormone (GnRH) is a decapeptide involved in the regulation of reproduction in all mammals, but the distribution of GnRH neurons within the brain varies widely among species. The objective of the present study was to characterize the number and distribution of GnRH neurons in the hypothalamus and preoptic area of llamas, an induced ovulator. The brains of female llamas (n = 4) were fixed, frozen and sectioned serially every 50 microns in the transverse (coronal) plane. Every 10th section was stained for immunohistochemical detection of GnRH-positive neuron cell bodies and fibers by incubation with 3,3'-diaminobenzidine...
April 12, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29656043/pituitary-estrogen-receptor-alpha-is-involved-in-luteinizing-hormone-pulsatility-at-mid-gestation-in-the-south-american-plains-vizcacha-lagostomus-maximus-rodentia-caviomorpha
#18
Sofía Proietto, Lorena Yankelevich, Federico Martín Villarreal, Pablo Ignacio Felipe Inserra, Santiago Elías Charif, Alejandro Raúl Schmidt, Santiago Andrés Cortasa, María Clara Corso, Noelia Paula Di Giorgio, Victoria Lux-Lantos, Alfredo Daniel Vitullo, Julia Halperin, Verónica Berta Dorfman
The South American plains vizcacha, Lagostomus maximus, is a caviomorph rodent native from Argentina, Bolivia and Paraguay. It shows peculiar reproductive features like pre-ovulatory follicle recruitment during pregnancy with an ovulatory process at around mid-gestation. We have described the activation of the hypothalamic - pituitary - ovarian (HPO) axis during pregnancy. A progressive decrease of progesterone (P4) at mid-pregnancy elicits the delivery of gonadotropin-releasing hormone (GnRH) with the consequent secretion of follicle stimulating hormone (FSH) and estradiol (E2 ) followed by luteinizing hormone (LH) release resulting in follicular luteinization and the P4 concentration recover...
April 12, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29655478/gonadotrophin-releasing-hormone-agonists-and-other-contraceptive-medications-in-exotic-companion-animals
#19
REVIEW
Nico J Schoemaker
The use of a gonadotrophin-releasing hormone agonist slow-release implant (GnRH A-SRI) has become increasingly popular as an alternative for surgical contraception in many species. Although these implants have proven to be very effective in some species (eg, ferrets, rats, chicken, psittacines, and iguanas), they have been found less effective in other species (eg, male guinea pigs and rabbits, veiled chameleons, slider turtles, and leopard geckos). This review provides an overview of the available literature on the effects of GnRH A-SRIs in companion exotic animals...
May 2018: Veterinary Clinics of North America. Exotic Animal Practice
https://www.readbyqxmd.com/read/29650233/bisphenol-a-exposure-and-risk-of-idiopathic-central-precocious-puberty-among-school-aged-girls-in-shanghai-china
#20
Yao Chen, Yingcan Wang, Guodong Ding, Ying Tian, Zhijun Zhou, Xiumin Wang, Lixiao Shen, Hong Huang
BACKGROUND: Bisphenol A (BPA) is a well-known and widely used endocrine disrupter, but data on its effects on childhood reproductive development are limited. OBJECTIVES: We investigated the possible relationship between exposure to BPA and idiopathic central precocious puberty (ICPP) in school-aged girls. METHODS: We conducted a 1:1 matched case-control study in Shanghai, China, between July 2011 and September 2012. This study included 136 school-aged (6 to 9 years old) girls diagnosed with ICPP and 136 controls matched for age and body mass index (BMI)...
April 9, 2018: Environment International
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