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https://www.readbyqxmd.com/read/28921586/down-syndrome-maternal-serum-markers-in-oocyte-donation-and-other-assisted-reproductive-technologies
#1
Aurore Bonnin, Françoise Muller, Marie-Victoire Senat, Corinne Sault, Armelle Galland, Joëlle Taieb, Sophie Dreux, Jean Bouyer, Alexandra Benachi
OBJECTIVE: Because maternal serum markers (PAPP-A, hCGβ, and AFP) used for Down syndrome (DS) screening have been described as predictors of obstetrical complications and because assisted reproductive technology (ART) pregnancies are known to be at increased risk for obstetrical complications, it is unclear whether or not correction factors should be applied to the calculated risk of DS. The purpose of this study was to evaluate DS maternal serum markers in oocyte donation (OD) and ART pregnancies in comparison with natural pregnancies...
September 16, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28915981/transcutaneous-electrical-acupoint-stimulation-improves-the-outcomes-of-in-vitro-fertilization-a-prospective-randomized-and-controlled-study
#2
Fan Qu, Fang-Fang Wang, Yan Wu, Jue Zhou, Nicola Robinson, Paul J Hardiman, Jie-Xue Pan, Yi-Jing He, Yu-Hang Zhu, Han-Zhi Wang, Xiao-Qun Ye, Ke-Lin He, Long Cui, Hong-Li Zhao, Ying-Hui Ye
OBJECTIVES: To explore whether transcutaneous electrical acupoint stimulation (TEAS) can improve the outcomes of in vitro fertilization (IVF). DESIGN: A prospective, randomized, and controlled study. SETTING: IVF center in a university hospital. PARTICIPANTS: Four hundred and eighty-one infertile patients with bilateral tubal blockage who were referred for IVF. Patients were randomized into four groups. INTERVENTION: TEAS was administered for 30min, respectively, at 24h before TVOR and two hours before ET...
September 2017: Explore: the Journal of Science and Healing
https://www.readbyqxmd.com/read/28910277/interplay-between-microtubule-bundling-and-sorting-factors-ensures-acentriolar-spindle-stability-during-c-elegans-oocyte-meiosis
#3
Timothy J Mullen, Sarah M Wignall
In many species, oocyte meiosis is carried out in the absence of centrioles. As a result, microtubule organization, spindle assembly, and chromosome segregation proceed by unique mechanisms. Here, we report insights into the principles underlying this specialized form of cell division, through studies of C. elegans KLP-15 and KLP-16, two highly homologous members of the kinesin-14 family of minus-end-directed kinesins. These proteins localize to the acentriolar oocyte spindle and promote microtubule bundling during spindle assembly; following klp-15/16 depletion, microtubule bundles form but then collapse into a disorganized array...
September 14, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28904501/patient-experience-with-conscious-sedation-as-a-method-of-pain-relief-for-transvaginal-oocyte-retrieval-a-cross-sectional-study
#4
Himanshu Singhal, Prasanna S Premkumar, Achamma Chandy, Aleyamma T Kunjummen, Mohan S Kamath
AIM: The aim of the study was to measure patient's satisfaction level and acceptance of conscious sedation as a method of pain relief following transvaginal oocyte retrieval (TVOR) during assisted reproduction technology treatment. We also evaluated the factors that may influence the efficacy of conscious sedation method. SETTING AND DESIGN: A prospective cross-sectional study. MATERIALS AND METHODS: Prospective study was conducted from October 2015 to January 2016 at a university-level hospital and 100 women were recruited...
April 2017: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28900749/chromosomal-polymorphisms-are-independently-associated-with-multinucleated-embryo-formation
#5
Ling Sun, Zhi-Heng Chen, Li Yang, Cui-Xing Yi, Jun Liu, Chun-Quan Ou
PURPOSE: The purpose of this study is to explore the factors associated with embryo multinucleation, particularly focused on the influence of parental chromosomal polymorphisms in embryo multinucleation. METHODS: This is a retrospective case-control study involving 1260 infertile couples undergoing their first IVF/ICSI cycles. Couples were screened for abnormalities in their karyotype and were evaluated for blastomere persistence of multinucleation. Demographic characteristics, stimulation protocol, and pregnant outcomes were analyzed using logistic regression analysis...
September 12, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28899645/transcriptome-based-discovery-of-pathways-and-genes-related-to-reproduction-of-the-black-tiger-shrimp-penaeus-monodon
#6
Tanaporn Uengwetwanit, Pattareeya Ponza, Duangjai Sangsrakru, Duangdao Wichadakul, Supawadee Ingsriswang, Rungnapa Leelatanawit, Sirawut Klinbunga, Sithichoke Tangphatsornruang, Nitsara Karoonuthaisiri
The black tiger shrimp (Penaeus monodon) is an aquatic animal with considerable economic importance. Poor reproductive maturation in captivity impedes sustainable aquaculture production of this species. This study aims to provide transcriptomic information on reproductive organs using 454 pyrosequencing technology. The transcriptome analysis of ovaries and testes revealed 41,136 transcripts with 20,192 contigs. We found novel sets of transcripts completing several important reproductive pathways such as gonadotropin-releasing hormone (GnRH) signaling and progesterone-mediated oocyte maturation...
September 9, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28892263/regulation-of-germ-cell-development-by-intercellular-signaling-in-the-mammalian-ovarian-follicle
#7
REVIEW
Hugh J Clarke
Prior to ovulation, the mammalian oocyte undergoes a process of differentiation within the ovarian follicle that confers on it the ability to give rise to an embryo. Differentiation comprises two phases-growth, during which the oocyte increases more than 100-fold in volume as it accumulates macromolecules and organelles that will sustain early embryogenesis; and meiotic maturation, during which the oocyte executes the first meiotic division and prepares for the second division. Entry of an oocyte into the growth phase appears to be triggered when the adjacent granulosa cells produce specific growth factors...
September 11, 2017: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/28886138/reproductive-life-history-of-sablefish-anoplopoma-fimbria-from-the-u-s-washington-coast
#8
José M Guzmán, J Adam Luckenbach, Mollie A Middleton, Kenneth C Massee, Cortney Jensen, Frederick W Goetz, Andrew J Jasonowicz, Penny Swanson
Sablefish (Anoplopoma fimbria) is a marine groundfish that supports valuable fisheries in the North Pacific Ocean and holds promise for marine aquaculture. Limited information is available, however, about its reproductive biology. This study aimed to characterize the complete reproductive cycle, including seasonal changes in gonadal development (macroscopic and histological), plasma sex steroid levels (17β-estradiol -E2-, and 11-ketotestosterone -11KT-), gonadosomatic and hepatosomatic indices (GSI, and HSI), and condition factor (K) of female and male sablefish captured off the Washington coast...
2017: PloS One
https://www.readbyqxmd.com/read/28880872/microtubule-actin-crosslinking-factor-1-macf1-domain-function-in-balbiani-body-dissociation-and-nuclear-positioning
#9
Matias Escobar-Aguirre, Hong Zhang, Allison Jamieson-Lucy, Mary C Mullins
Animal-vegetal (AV) polarity of most vertebrate eggs is established during early oogenesis through the formation and disassembly of the Balbiani Body (Bb). The Bb is a structure conserved from insects to humans that appears as a large granule, similar to a mRNP granule composed of mRNA and proteins, that in addition contains mitochondria, ER and Golgi. The components of the Bb, which have amyloid-like properties, include germ cell and axis determinants of the embryo that are anchored to the vegetal cortex upon Bb disassembly...
September 7, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28879481/association-between-the-number-of-oocytes-retrieved-and-cumulative-live-birth-rate-in-women-aged-35-40%C3%A2-years-undergoing-long-gnrh-agonist-ivf-icsi-cycles
#10
Jianjun Zhou, Bin Wang, Yali Hu, Haixiang Sun
PURPOSE: To study the association between the numbers of oocytes retrieved and the cumulative live birth rates (LBR) in women aged 35-40 years undergoing long GnRH agonist IVF/ICSI cycles. METHODS: A total of 931 women aged 35-40 years who underwent their first cycle of IVF/ICSI treatment between January 2010 and December 2013 at Nanjing Drum Tower Hospital were identified and reviewed. The main endpoint of this study was the cumulative LBR after one complete oocyte retrieval, which included fresh and all subsequent frozen-thaw embryo transfer cycles...
September 6, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28874516/regulation-of-amh-by-oocyte-specific-growth-factors-in-human-primary-cumulus-cells
#11
Scott Convissar, Marah Armouti, Michelle Fierro, Nicola Winston, Humberto Scoccia, A Musa Zamah, Carlos Stocco
The regulation of AMH production by follicular cells is poorly understood. The purpose of this study was to determine the role of the oocyte-secreted factors, growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP15), on AMH production in primary human cumulus cells. Cumulus cells from IVF patients were cultured with a combination of GDF9, BMP15, recombinant FSH, and specific signaling inhibitors. Stimulation with GDF9 or BMP15 separately had no significant effect on AMH mRNA levels. In contrast, simultaneous stimulation with GDF9 and BMP15 (G+B) resulted in a significant increase in AMH mRNA expression...
September 5, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28870987/maternal-dead-end-1-promotes-translation-of-nanos1-through-binding-the-eif3-complex
#12
Tristan Aguero, Zhigang Jin, Sandip Chorghade, Auinash Kalsotra, Mary Lou King, Jing Yang
In the developing embryo, primordial germ cells (PGCs) represent the exclusive progenitors of the gametes, and their loss results in adult infertility. During early development, PGCs are exposed to numerous signals that specify somatic cell fates. To prevent somatic differentiation, PGCs must transiently silence their genome, an early developmental process that requires Nanos activity. However, it is unclear how nanos translation is regulated in developing embryos. We report here that translation of nanos1 after fertilization requires Dead End1 (Dnd1), a vertebrate-specific germline RNA-binding protein...
September 4, 2017: Development
https://www.readbyqxmd.com/read/28870888/cell-secreted-vesicles-containing-micrornas-as-regulators-of-gamete-maturation
#13
Juliano C da Silveira, Ana Clara F C M de Avila, Hannah L Garrett, Jason Bruemmer, Quinton Winger, Gerrit Bouma
Mammalian gamete maturation requires extensive signaling between germ cells and their surrounding somatic cells. In the ovary, theca cells, mural granulosa cells, cumulus cells and the oocyte all secrete factors throughout follicle growth and maturation that are critical for ovulation of a high quality oocyte with the competence to develop into an embryo. Similarly, maturation of sperm occurs as it transits the epididymis during which epididymal epithelium and sperm exchange secretory factors that are required for sperm to gain motility and fertility...
September 4, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28868939/characterization-of-a-suboptimal-ivf-population-and-clinical-outcome-after-two-ivf-cycles
#14
Beatriz Alvaro Mercadal, Ignacio Rodríguez, Gemma Arroyo, Francisca Martínez, Pedro Nolasco Barri, Buenaventura Coroleu
The number of oocytes retrieved in in vitro fertilization (IVF) cycles is an independent factor influencing pregnancy rate (PR), and optimal number of oocytes would be between 10 and 15. This has led to the hypothesis that the identification of a suboptimal group of responders beforehand (4-9 oocytes retrieved) would allow physicians to optimize their PR. A retrospective observational study counting on 735 women doing an IVF treatment in our center was performed. Multivariable logistic regression was used to analyze the relationship between anti-Mullerian hormone (AMH) and antral follicle count (AFC), within suboptimal and optimal responders...
September 3, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28867205/collective-growth-in-a-small-cell-network
#15
Jasmin Imran Alsous, Paul Villoutreix, Alexander M Berezhkovskii, Stanislav Y Shvartsman
Theoretical studies suggest that many of the emergent properties associated with multicellular systems arise already in small networks [1, 2]. However, the number of experimental models that can be used to explore collective dynamics in well-defined cell networks is still very limited. Here we focus on collective cell behavior in the female germline cyst in Drosophila melanogaster, a stereotypically wired network of 16 cells that grows by ∼4 orders of magnitude with unequal distribution of volume among its constituents...
September 11, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28866280/estrogen-alters-gonadal-soma-derived-factor-gsdf-foxl2-expression-levels-in-the-testes-associated-with-testis-ova-differentiation-in-adult-medaka-oryzias-latipes
#16
Tohru Kobayashi, Ayaka Chiba, Tadashi Sato, Taijun Myosho, Jun Yamamoto, Tetsuro Okamura, Yuta Onishi, Mitsuru Sakaizumi, Satoshi Hamaguchi, Taisen Iguchi, Yoshifumi Horie
Testis-ova differentiation in sexually mature male medaka (Oryzias latipes) is easily induced by estrogenic chemicals, indicating that spermatogonia persist in sexual bipotentiality, even in mature testes in medaka. By contrast, the effects of estrogen on testicular somatic cells associated with testis-ova differentiation in medaka remain unclear. In this study, we focused on the dynamics of sex-related genes (Gsdf, Dmrt1, and Foxl2) expressed in Sertoli cells in the mature testes of adult medaka during estrogen-induced testis-ova differentiation...
August 22, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28865551/serum-antim%C3%A3-llerian-hormone-levels-are-independently-related-to-miscarriage-rates-after-in%C3%A2-vitro-fertilization-embryo-transfer
#17
Bruno Tarasconi, Teddy Tadros, Jean-Marc Ayoubi, Stephanie Belloc, Dominique de Ziegler, Renato Fanchin
OBJECTIVE: To investigate whether serum antimüllerian hormone (AMH) levels are independently related to miscarriage rates after in vitro fertilization-embryo transfer (IVF-ET). DESIGN: Cohort study. SETTING: University-affiliated IVF-ET center. PATIENT(S): A total of 1,060 patients who attained a clinical pregnancy after IVF-ET. INTERVENTIONS(S): Centralized serum AMH measurements were performed within the 12 months before IVF-ET...
September 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28860865/advanced-maternal-age-ethical-and-medical-considerations-for-assisted-reproductive-technology
#18
REVIEW
Brittany J Harrison, Tara N Hilton, Raphaël N Rivière, Zachary M Ferraro, Raywat Deonandan, Mark C Walker
OBJECTIVES: This review explores the ethical and medical challenges faced by women of advanced maternal age who decide to have children. Assisted reproductive technologies (ARTs) make post-menopausal pregnancy physiologically plausible, however, one must consider the associated physical, psychological, and sociological factors involved. METHODS: A quasi-systematic review was conducted in PubMed and Ovid using the key terms post-menopause, pregnancy + MeSH terms [donations, hormone replacement therapy, assisted reproductive technologies, embryo donation, donor artificial insemination, cryopreservation]...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/28856758/the-gonadal-soma-controls-ovarian-follicle-proliferation-through-gsdf-in-zebrafish
#19
Yi-Lin Yan, Thomas Desvignes, Ruth BreMiller, Catherine Wilson, Danielle Dillon, Samantha High, Bruce Draper, Charles Loren Buck, John Postlethwait
BACKGROUND: Aberrant signaling between germ cells and somatic cells can lead to reproductive disease and depends on diffusible signals, including TGFB-family proteins. The TGFB-family protein Gsdf (gonadal soma derived factor) controls sex determination in some fish and is a candidate for mediating germ cell/soma signaling. RESULTS: Zebrafish expressed gsdf in somatic cells of bipotential gonads and expression continued in ovarian granulosa cells and testicular Sertoli cells...
August 30, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28854722/quality-of-life-anxiety-and-depression-of-german-italian-and-french-couples-undergoing-cross-border-oocyte-donation-in-spain
#20
S Madero, S Gameiro, D García, D Cirera, R Vassena, A Rodríguez
STUDY QUESTION: What is the quality of life (QoL) and mental health of infertile heterosexual couples from different nations (Italy, Germany and France) undergoing cross-border oocyte donation (OD) in Spain? SUMMARY ANSWER: Women have lower QoL and more anxiety than their male partners; overall French couples have lower QoL than their Italian and German counterparts. WHAT IS KNOWN ALREADY: In Europe, thousands of couples move across national borders annually to seek ARTs, primarily OD, driven mainly by legal restrictions in their countries of origin...
September 1, 2017: Human Reproduction
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