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Superovulation

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https://www.readbyqxmd.com/read/29787998/repeated-superovulation-increases-the-risk-of-osteoporosis-and-cardiovascular-diseases-by-accelerating-ovarian-aging-in-mice
#1
Jinjin Zhang, Zhiwen Lai, Liangyan Shi, Yong Tian, Aiyue Luo, Zheyuan Xu, Xiangyi Ma, Shixuan Wang
Superovulation procedures and assisted reproductive technologies have been widely used to treat couples who have infertility problems. Although generally safe, the superovulation procedures are associated with a series of complications, such as ovarian hyper-stimulation syndrome, thromboembolism, and adnexal torsion. The role of long-term repeated superovulation in ovarian aging and especially in associated disorders such as osteoporosis and cardiovascular diseases is still unclear. In this study, we sought to determine if repeated superovulation by ten cycles of treatment with pregnant mare serum gonadotropin/human chorionic gonadotropin could affect ovarian reserve, ovarian function, bone density and heart function...
May 22, 2018: Aging
https://www.readbyqxmd.com/read/29778272/development-of-the-waveless-bovine-model
#2
F Jimenez-Krassel, J L H Ireland, C Kronemeyer, A Wilson-Alvarado, J J Ireland
Development of a bovine model without ovarian follicular waves (waveless) and transient increases in gonadotropin secretion during estrous cycles may lead to new methods to more consistently regulate ovulatory follicle growth thereby improving efficiency of embryo transfer. We hypothesized that the GnRH antagonist acyline would inhibit gonadotropin secretion thereby blocking follicular waves, ovarian function and ovulation during estrous cycles of cattle. To test this hypothesis, beef heifers (n = 5 per group) were treated twice daily with vehicle (control) or 25 or 50 μg/kg acyline beginning 12 h after GnRH-induced ovulation and ending 21 days later...
May 15, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29753485/genome-wide-association-study-and-in-silico-functional-analysis-of-the-number-of-embryos-produced-by-holstein-donors
#3
C Jaton, F S Schenkel, M Sargolzaei, A Cánova, F Malchiodi, C A Price, C Baes, F Miglior
Superovulation or ovum pick-up and in vitro fertilization are technologies used to produce an increased number of embryos from elite females. Embryo production traits have been shown to be heritable, but the genes that cause this variability have not yet been assessed. The main objectives of this study were to perform a genome-wide association study (GWAS) to find single nucleotide polymorphisms (SNP) associated with embryo production traits and to identify candidate genes affecting the number of embryos produced by Holstein donors in Canada that may provide insight into the regulation of embryo production...
May 9, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29751229/endoscopy-mediated-intratubal-insemination-in-the-cow-development-of-a-novel-minimally-invasive-ai-technique
#4
Karina Radefeld, Sophie Papp, Vitezslav Havlicek, Jane M Morrell, Gottfried Brem, Urban Besenfelder
Conventionally inseminated spermatozoa suffer a dramatic reduction in numbers during their long journey until fertilization. In addition sperm survival seems to be strongly affected by the reconstitution of the female reproductive tract in the post partum period. The purpose of this study was to develop a novel AI technique for cattle that allows the deposition of spermatozoa directly into the ampulla in the immediate vicinity of the fertilization site. This new reproductive biotechnique was investigated with focus on semen origin, sperm dosage, semen preparation and time of insemination...
April 27, 2018: Theriogenology
https://www.readbyqxmd.com/read/29738181/-repeated-superovulation-induction-after-failure-in-previous-ivf-et-cycles-with-the-ultra-long-protocol-analysis-of-outcomes-of-clinical-pregnancy
#5
Bin Wang, Na Kong, Jing-Yu Liu, Ning-Yuan Zhang, Ying-Chun Zhu, Jian-Jun Zhou
Objective: To analyze the clinical outcomes of repeated superovulation induction in patients with adenomyosis or moderate to severe pelvic endometriosis after failure in previous IVF-ET cycles with the ultra-long protocol. METHODS: We retrospectively analyzed the clinical data about 37 patients with adenomyosis or moderate to severe pelvic endometriosis in our center from 2009 to 2013, who underwent repeated IVF-ET after failure in the previous cycles with the ultra-long protocol, namely by injection of 2-6 ampoules of 3...
December 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29696351/the-effects-of-superovulation-with-gonadotropins-on-autoantibody-levels-in-patients-undergoing-assisted-reproductive-cycles
#6
Mahnaz Ashrafi, Elham Amirchaghmaghi, Arezoo Arabipoor, Samira Vesali, Reza Salman-Yazdi
PURPOSE: To evaluate the effect of controlled ovarian stimulation (COH) with gonadotropins on the serum levels of autoantibodies in the women who underwent in vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) cycles and to compare basal levels of these autoantibodies between groups according to history of COH. METHODS: This prospective cohort study was performed from October 2014 to March 2016 in the Royan Institute. The volunteered infertile women with regard to the inclusion criteria, who underwent IVF/ICSI cycles, were recruited...
April 25, 2018: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29662823/the-likelihood-of-achieving-pregnancy-through-timed-coitus-in-young-infertile-women-with-decreased-ovarian-reserve
#7
Hwa Seon Koo, In Ok Song, Sun Hwa Cha, Chan Woo Park, Hye Ok Kim
Objective: To evaluate the pregnancy rate and time to pregnancy after timed coitus with or without superovulation in infertile young women younger than 35 years old with low serum anti-Müllerian hormone (AMH) levels (<25th percentile). Methods: A total of 202 patients younger than 35 years old were recruited retrospectively between 2010 and 2012. Ninety-eight women had normal serum AMH levels (25-75th percentile), 75 women had low serum AMH levels (5th≤&<25th percentile) and 29 women had very low serum AMH levels (<5th percentile), according to reference values for their age group...
March 2018: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/29625802/cryosurvival-of-rabbit-embryos-obtained-after-superovulation-with-corifollitropin-alfa-with-or-without-lh
#8
José Salvador Vicente, María Pilar Viudes-de-Castro, José Isaí Cedano-Castro, Francisco Marco-Jiménez
The efficiency of an embryo bank depends on provision of optimal conditions for recovery, cryopreservation and transfer to a breed or strain. In this sense, increasing the number of embryos available using superovulation should improve the cryobank efficiency. However, vagueness of response to conventional protocols to control or increase ovarian response and the quality of oocytes and embryos and their cryotolerance remain a challenge. The aim of our study was to evaluate the effect of corifollitropin alpha (CTP) and a recombinant human FSH (rhFSH), alone or supplemented with rhLH, on embryo cryosurvival by in vitro development and OCT4 and NANOG mRNA abundance at blastocyst stage and offspring rate...
March 31, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29621956/ovarian-hyperstimulation-reduces-vascular-endothelial-growth-factor-a-during-uterine-receptivity
#9
Kevin Danastas, Camilla M Whittington, Samson N Dowland, Valery Combes, Christopher R Murphy, Laura A Lindsay
The angiogenic factor vascular endothelial growth factor-A (VEGFA) plays a critical role during early pregnancy in many species including the rat, and any alterations in VEGFA levels can severely impact blastocyst implantation rates. The rat ovarian hyperstimulation (OH) model is useful in studying how the induction of superovulation affects VEGFA levels and endometrial receptivity to blastocyst implantation. The present study shows that the major isoform in the rat uterus, Vegf188 , is reduced at the time of receptivity in OH compared to normal pregnancy, whereas there is no change in Vegf164 and Vegf120 messenger RNA (mRNA)...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29615109/human-chorionic-plate-derived-mesenchymal-stem-cells-transplantation-restores-ovarian-function-in-a-chemotherapy-induced-mouse-model-of-premature-ovarian-failure
#10
Jun Li, Qingtong Yu, Haisen Huang, Wenwen Deng, Xia Cao, Michael Adu-Frimpong, Jiangnan Yu, Ximing Xu
BACKGROUND: Previous studies have reported that transplantation of mesenchymal stem cells (MSCs) from many human tissues could ameliorate ovarian dysfunction. However, no study has revealed the therapeutic efficiency of MSCs derived from the chorionic plate (CP-MSCs) for premature ovarian failure (POF). METHODS: We investigated the restorative effects of CP-MSCs on cyclophosphamide (CTX)-induced POF. The POF mouse models were established via intraperitoneal injection of 50 mg/kg CTX into female mice for 15 consecutive days...
April 3, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29602136/influence-of-polygamous-versus-monogamous-mating-on-embryo-production-in-four-different-strains-of-mice-after-superovulatory-treatment
#11
Malte Heykants, Hagen Scherb, Geert Michel, Esther Mahabir
We determined the effect of monogamous or polygamous mating with 2 females on vaginal plug (VP) rate, embryo donors (ED), 2-cell embryo production, and male performance after superovulation of females aging 24d or 45-48d. C57BL/6NCrl (B6N), BALB/cAnCrl (BALB/cN), FVB/NCrl (FVB/N), and Crl:CD1(ICR) (CD-1) females received 5 IU eCG and 5 IU hCG (24d) or 7.5 IU eCG and 7.5 IU hCG (45-48d) 48 h apart. After the hCG injection, females were paired with males, which alternated weekly in monogamous or polygamous mating...
March 17, 2018: Theriogenology
https://www.readbyqxmd.com/read/29574310/high-serum-igf-1-levels-are-associated-with-pregnancy-loss-following-frozen-thawed-euploid-embryo-transfer-cycles
#12
Mohamad Irani, Dimitrios Nasioudis, Steven S Witkin, Vinay Gunnala, Steven D Spandorfer
An elevated level of insulin growth factor (IGF-1) in rat uterine fluid has been shown to exert detrimental effects of embryo development possibly leading to an increase in pregnancy loss. Interestingly, the administration of somatostatin to rats undergoing superovulation reduced IGF-1 levels in uterine luminal fluid and thus reversed its deleterious effects on embryo development and increased the number of normal embryos. Therefore, we investigated whether serum levels of IGF-1 correlate with the incidence of pregnancy loss following IVF...
March 16, 2018: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29551300/-first-line-management-without-ivf-of-infertility-related-to-endometriosis-result-of-medical-therapy-results-of-ovarian-superovulation-results-of-intrauterine-insemination-cngof-has-endometriosis-guidelines
#13
J Boujenah, P Santulli, E Mathieu-d'Argent, C Decanter, C Chauffour, P Poncelet
INTRODUCTION: Using the structured methodology of French guidelines (HAS-CNGOF), the aim of this chapter was to formulate good practice points (GPP), in relation to optimal non-ART management of endometriosis related to infertility, based on the best available evidence in the literature. MATERIALS AND METHODS: This guideline was produced by a group of experts in the field including a thorough systematic search of the literature (from January 1980 to March 2017)...
March 2018: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29544633/gonadotropin-surge-attenuating-factor-a-nonsteroidal-ovarian-hormone-controlling-gnrh-induced-lh-secretion-in-the-normal-menstrual-cycle
#14
Ioannis E Messinis, Christina I Messini, George Anifandis, Antonios Garas, Alexandros Daponte
Gonadotropin surge-attenuating factor (GnSAF) is a nonsteroidal ovarian substance, which attenuates the endogenous LH surge in superovulated women. Different molecular sequences have been found, but only one of them has shown substantial homology to a known substance of the human genome. A molecular mass of 12.5kDa showing identity to the carboxyl-terminal fragment of human serum albumin and expressing GnSAF bioactivity in vitro has been identified. It has been suggested that in the normal menstrual cycle the in vivo bioactivity of GnSAF increases under the influence of the intercycle rise of FSH...
2018: Vitamins and Hormones
https://www.readbyqxmd.com/read/29524809/anti-m%C3%A3-llerian-hormone-and-antral-follicle-count-are-more-effective-for-selecting-ewes-with-good-potential-for-in-vivo-embryo-production-than-the-presence-of-fecg-e-mutation-or-ecg-pre-selection-tests
#15
Pedro Henrique Nicolau Pinto, Mario Felipe Alvarez Balaro, Joanna Maria Gonçalves Souza-Fabjan, Lilian Dos Santos Ribeiro, Gláucia Mota Bragança, Ceci Ribeiro Leite, Eduardo Kenji Nunes Arashiro, Kleibe de Moraes Silva, Jeferson Ferreira Da Fonseca, Felipe Zandonadi Brandão
This study aims to compare four different methods for selecting high responding sheep donors for in vivo embryo production. These methods include a pre-selection eCG test (eCG), antral follicle count (AFC), plasma anti-Müllerian hormone measurement (AMH) and genotyping for the presence of the FecGE mutation (a polymorphism in the GDF9 gene associated with increased ovulation rate). Santa Ines ewe lambs (n = 25) underwent superovulation (SOV) with 800 IU equine chorionic gonadotropin (eCG) and the corpus luteum (CL) count was recorded by laparoscopy after eight days...
June 2018: Theriogenology
https://www.readbyqxmd.com/read/29493111/neonatal-outcomes-following-fresh-as-compared-to-frozen-thawed-embryo-transfer-in-in-vitro-fertilization
#16
REVIEW
Kristin Van Heertum, Rachel Weinerman
In vitro fertilization (IVF) and embryo cryopreservation have become increasingly common in recent years. As utilization increases, it is important to understand the clinical effects these technologies have on offspring, as well as the mechanisms behind these effects. Many epidemiologic studies have observed that pregnancies following IVF are more likely to be affected by obstetric complications such as pre-eclampsia, preterm birth, and small for gestational age neonates compared with naturally conceived pregnancies...
May 1, 2018: Birth Defects Research
https://www.readbyqxmd.com/read/29492315/maintenance-of-mest-imprinted-methylation-in-blastocyst-stage-mouse-embryos-is-less-stable-than-other-imprinted-loci-following-superovulation-or-embryo-culture
#17
REVIEW
Brenna A M Velker, Michelle M Denomme, Robert T Krafty, Mellissa R W Mann
Assisted reproductive technologies are fertility treatments used by subfertile couples to conceive their biological child. Although generally considered safe, these pregnancies have been linked to genomic imprinting disorders, including Beckwith-Wiedemann and Silver-Russell Syndromes. Silver-Russell Syndrome is a growth disorder characterized by pre- and post-natal growth retardation. The Mest imprinted domain is one candidate region on chromosome 7 implicated in Silver-Russell Syndrome. We have previously shown that maintenance of imprinted methylation was disrupted by superovulation or embryo culture during pre-implantation mouse development...
July 2017: Environmental Epigenetics
https://www.readbyqxmd.com/read/29473888/melatonin-mediated-development-of-ovine-cumulus-cells-perhaps-by-regulation-of-dna-methylation
#18
Yi Fang, Shoulong Deng, Jinlong Zhang, Haijun Liu, Yihai Li, Xiaosheng Zhang, Yixun Liu
Cumulus cells of pre-pubertal domestic animals are dysfunctional, perhaps due to age-specific epigenetic events. This study was designed to determine effects of melatonin treatment of donors on methylation modification of pre-pubertal cumulus cells. Cumulus cells from germinal vesicle stage cumulus oocyte complexes (COCs) were collected from eighteen lambs which were randomly divided into control group (C) and melatonin group given an 18 mg melatonin implant subcutaneous (M). Compared to the C group, the M group had higher concentrations of melatonin in plasma and follicular fluid ( p < 0...
February 23, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29463146/optimizing-the-first-line-fertility-treatment
#19
Mohamad Irani, Stephen Chow, Derek Keating, Simone Elder, Zev Rosenwaks, Gianpiero Palermo
The objective of this study was to identify sperm score thresholds to achieve satisfactory intrauterine insemination (IUI) success rates according to the response to stimulation with clomiphene citrate (CC). To minimize the confounding effect of female age, we included only CC/IUI cycles of women ≤35 years old. A total of 1,194 CC/IUI cycles were included. Semen volume, concentration, and motility influenced the clinical pregnancy rate (CPR). Normal morphology (≥4%) was associated with a comparable CPR with 3%, 2%, and 1% normal forms (15...
February 20, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29402772/ablation-of-the-mir-17-92-microrna-cluster-in-germ-cells-causes-subfertility-in-female-mice
#20
Jian Wang, Bo Xu, Geng G Tian, Tao Sun, Ji Wu
BACKGROUND/AIMS: Oogenesis is a highly complex process that is intricately regulated by interactions of multiple genes and signaling molecules. However, the underlying molecular mechanisms are poorly understood. There is emerging evidence that microRNAs contribute to oogenesis. Here, we aimed to investigate the role of miR-17-92 cluster in regulating oogenesis. METHODS: The miR-17-92 cluster was genetically ablated in germ cells of female mice by applying the Cre-loxp system for conditional gene knockout...
2018: Cellular Physiology and Biochemistry
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