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https://www.readbyqxmd.com/read/28938736/deep-sequencing-shows-that-oocytes-are-not-prone-to-accumulate-mtdna-heteroplasmic-mutations-during-ovarian-ageing
#1
L Boucret, C Bris, V Seegers, D Goudenège, V Desquiret-Dumas, M Domin-Bernhard, V Ferré-L'Hotellier, P E Bouet, P Descamps, P Reynier, V Procaccio, P May-Panloup
STUDY QUESTION: Does ovarian ageing increase the number of heteroplasmic mitochondrial DNA (mtDNA) point mutations in oocytes? SUMMARY ANSWER: Our results suggest that oocytes are not subject to the accumulation of mtDNA point mutations during ovarian ageing. WHAT IS KNOWN ALREADY: Ageing is associated with the alteration of mtDNA integrity in various tissues. Primary oocytes, present in the ovary since embryonic life, may accumulate mtDNA mutations during the process of ovarian ageing...
October 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28938425/linking-stress-and-infertility-a-novel-role-for-ghrelin
#2
Luba Sominsky, Deborah M Hodgson, Eileen A McLaughlin, Roger Smith, Hannah M Wall, Sarah J Spencer
Infertility affects a remarkable one in four couples in developing countries. Psychological stress is a ubiquitous facet of life, and while stress affects us all at some point, prolonged or unmanageable stress may become harmful for some individuals, negatively impacting on their health, including fertility. For instance, women who struggle to conceive are twice as likely to suffer from emotional distress than fertile women. Assisted reproductive technology treatments place an additional physical, emotional and financial burden of stress, particularly on women, who are often exposed to invasive techniques associated with treatment...
July 27, 2017: Endocrine Reviews
https://www.readbyqxmd.com/read/28937818/divorce-in-an-island-bird-population-causes-consequences-and-lack-of-inheritance
#3
Nathaniel T Wheelwright, Céline Teplitsky
Divorce (mate switching) is widely considered an adaptive strategy that female birds use to improve their reproductive success. However, in few species are the causes and consequences of divorce well understood, and the genetic basis and inheritance of divorce have never been explored. In Savannah sparrows (Passerculus sandwichensis) breeding on Kent Island, New Brunswick, Canada, 47.0% of pairs in which both partners survived to the following breeding season ended in divorce. Secondary females, which received less parental assistance than primary females, tended to divorce when breeding success was low or when paired with small males...
October 2017: American Naturalist
https://www.readbyqxmd.com/read/28936648/live-cell-imaging-of-f-actin-dynamics-during-fertilization-in-arabidopsis-thaliana
#4
Daichi Susaki, Daisuke Maruyama, Ramesh Yelagandula, Frederic Berger, Tomokazu Kawashima
Fertilization comprises a complex series of cellular processes leading to the fusion of a male and female gamete. Many studies have been carried out to investigate each step of fertilization in plants; however, our comprehensive understanding of all the sequential events during fertilization is still limited. This is largely due to difficulty in investigating events in the female gametophyte, which is deeply embedded in the maternal tissue. Recent advances in confocal microcopy assisted by fluorescent marker lines have contributed to visualizing subcellular dynamics in real time during fertilization in vivo...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28935489/perinatal-complications-in-patients-with-unisutural-craniosynostosis-an-international-multicentre-retrospective-cohort-study
#5
Martijn J Cornelissen, Madiha Söfteland, Inge Apon, Lars Ladfors, Irene M J Mathijssen, Titia E Cohen-Overbeek, Gouke J Bonsel, Lars Kölby
PURPOSE: Craniosynostosis may lead to hampered fetal head molding and birth complications. To study the interaction between single suture craniosynostosis and delivery complications, an international, multicentre, retrospective cohort study was performed. MATERIALS AND METHODS: All infants born between 2006 and 2012 in the Netherlands and Sweden with sagittal or metopic suture synostosis were included. All births were included as a reference population. The primary outcome measure was rate of medically assisted labor...
August 19, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28935366/review-diagnosis-and-impact-of-sperm-dna-alterations-in-assisted-reproduction
#6
REVIEW
Luke Simon, Benjamin R Emery, Douglas T Carrell
Sperm nuclear and chromatin abnormalities are common among infertile men and are known to influence natural reproduction. These abnormalities are also considered detrimental to normal fertilization, embryo development, and successful implantation and pregnancies following assisted reproductive treatment (ART). Abnormalities in the sperm nucleus can be broadly classified into sperm chromosomal abnormalities (aneuploidies) and sperm DNA abnormalities such as abnormal packing, DNA integrity, or DNA fragmentation...
August 2, 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28932299/the-outcome-of-assisted-reproductive-techniques-among-couples-with-male-factors-at-prince-khalid-bin-sultan-fertility-centre-kingdom-of-saudi-arabia
#7
Hytham Bahaeldin Mukhtar, Amani Shaman, Hyder Osman Mirghani, Ayman Adnan Almasalmah
BACKGROUND: Thirty-three percent of infertility due to paternal factors, there are an increasing proportion of couples who decide to conceive by assisted reproductive techniques (ART). The outcome prediction is pivotal for decision making. AIM: We aimed to study the pregnancy outcomes of different ART with male factors infertility. METHODS: This is retrospective cross-sectional study conducted at Tabuk, Kingdom of Saudi Arabia. One hundred fifteen patients' records reviewed using a structured checklist to collect demographic data, sperm (concentration, motility, and morphology)...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28931736/the-influence-of-stress-hormones-and-aggression-on-cooperative-behaviour-in-subordinate-meerkats
#8
Ben Dantzer, Ines Braga Goncalves, Helen C Spence-Jones, Nigel C Bennett, Michael Heistermann, Andre Ganswindt, Constance Dubuc, David Gaynor, Marta B Manser, Tim H Clutton-Brock
In cooperative breeders, aggression from dominant breeders directed at subordinates may raise subordinate stress hormone (glucocorticoid) concentrations. This may benefit dominants by suppressing subordinate reproduction but it is uncertain whether aggression from dominants can elevate subordinate cooperative behaviour, or how resulting changes in subordinate glucocorticoid concentrations affect their cooperative behaviour. We show here that the effects of manipulating glucocorticoid concentrations in wild meerkats (Suricata suricatta) on cooperative behaviour varied between cooperative activities as well as between the sexes...
September 27, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28931409/clinical-review-of-24-35%C3%A2-year-olds-conceived-with-and-without-in-vitro-fertilization-study-protocol
#9
Sharon Lewis, Joanne Kennedy, David Burgner, Robert McLachlan, Sarath Ranganathan, Karin Hammarberg, Richard Saffery, David J Amor, Michael M H Cheung, Lex W Doyle, Markus Juonala, Susan Donath, John McBain, Jane Halliday
BACKGROUND: Children conceived by assisted reproductive technologies (ART) currently comprise 4% of Australian births. The manipulation of biological parameters related to fertilization and implantation are integral to successful ART but potentially pose a risk to the longer-term health of the offspring. There is consensus that many common adult health problems (particularly cardiovascular, metabolic and respiratory conditions) have their origins in early life, possibly before birth, and that risk trajectories track through childhood until clinical disease manifests in adulthood...
September 20, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28929987/cell-and-genetic-predictors-of-human-blastocyst-hatching-success-in-assisted-reproduction
#10
Anastasiya G Syrkasheva, Nataliya V Dolgushina, Andrey Yu Romanov, Olga V Burmenskaya, Nataliya P Makarova, Espet O Ibragimova, Elena A Kalinina, Gennady T Sukhikh
The aim was to identify cell and genetic predictors of human blastocyst hatching success in assisted reproduction programmes via a prospective case-control study. Blastocysts, donated by couples in assisted reproduction programmes were used. Hatching success assessment was performed after 144-146 h post-fertilization. The mRNA expression levels of cathepsin V (CTSV), GATA-binding protein 3 (GATA3) and human chorionic gonadotropin beta subunit 3, 5, 7 and 8 (CGB) genes were detected by quantitative real-time polymerase chain reaction...
September 20, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28929508/association-between-obesity-and-sperm-quality
#11
G A Ramaraju, S Teppala, K Prathigudupu, M Kalagara, S Thota, M Kota, R Cheemakurthi
There is awareness of likelihood of abnormal spermatozoa in obese men; however, results from previous studies are inconclusive. Advances in computer-aided sperm analysis (CASA) enable precise evaluation of sperm quality and include assessment of several parameters. We studied a retrospective cohort of 1285 men with CASA data from our infertility clinic during 2016. Obesity (BMI ≥30) was associated with lower (mean ± SE) volume (-0.28 ± 0.12, p-value = .04), sperm count (48.36 ± 16.51, p-value = ...
September 19, 2017: Andrologia
https://www.readbyqxmd.com/read/28928434/the-effect-of-frozen-thawed-embryo-transfer-performed-concurrently-with-hysteroscopy-on-the-reproductive-outcomes-during-assisted-reproductive-treatments
#12
Xiuxian Zhu, Hongjuan Ye, Yonglun Fu
The uterine environment is vital to the successful conception; recently, hysteroscopy was used to remove uterine anomalies in patients undergoing assisted reproductive treatments in combination with a "freeze-all" strategy. However, the rapid recurrence of uterine anomalies impose a negative impact on pregnancy. A possible way to avoid this issue is to implement frozen-thawed embryo transfer (FET) as soon as possible. Thus, we sought to investigate the impact of performing FET concurrently with hysteroscopy in the same mense on the pregnancy outcome...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927307/biological-therapy-for-non-obstructive-azoospermia
#13
Sarah C Vij, Edmund Sabanegh, Ashok Agarwal
Most male patients with non-obstructive azoospermia (NOA) have no therapeutic options outside of assisted reproductive techniques to conceive a biological child. If mature sperm cannot be obtained from the testes, these patients must rely on options of donor sperm or adoption. Several techniques are in the experimental stage to provide this patient population alternatives for conceiving. Areas covered: This review discusses three of the experimental techniques for restoring fertility in men with NOA: spermatogonial stem cell transplantation, the use of adult and embryonic stem cells to develop mature gametes and gene therapy...
September 19, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28925570/first-trimester-screening-based-on-ultrasound-and-cfdna-vs-first-trimester-combined-screening-a-randomized-controlled-study
#14
Karl Oliver Kagan, Fabrina Sroka, Jiri Sonek, Harald Abele, Kai Lüthgens, Maximilian Schmid, Philipp Wagner, Sara Brucker, Diethelm Wallwiener, Markus Hoopmann
OBJECTIVE: Prospective randomized trial to compare the performance of first trimester combined screening (FTCS) with an approach that uses the combination of a detailed ultrasound examination and cfDNA analysis. METHODS: Pregnant women with a normal first-trimester ultrasound examination at 11 to 13 weeks' gestation (fetal NT ≤3.5 mm and no fetal defects) were randomized into two groups. In the first group, the risk of aneuploidy was assessed using FTCS based on the most recent FMF UK algorithm...
September 19, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28925288/twins-and-socioeconomic-factors-changes-in-the-last-20%C3%A2-years
#15
Ariadne Malamitsi-Puchner, Konstantinos Voulgaris, Emmanouela Sdona, Christos Christou, Despina D Briana
Socioeconomic factors associated with twins/multiples have been sparsely studied. Analyzing data from the Hellenic Statistical Authority, regarding twin out of total births from 1996 to 2015, we showed that twinning rate in Greece has increased from 1996 and onwards, in parallel with advanced maternal age and decline in total births. Higher twin rates are associated with higher maternal education, better paid parental occupations, and thus wealthier families, married maternal status, while immigrants present a lower twinning rate than Greeks...
September 19, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28925272/-fertility-preserving-methods-in-women-with-breast-cancer-before-gonadotoxic-therapy
#16
N Halászová, I Crha, M Huser, V Weinberger, J Žáková, M Ješeta, E Lousová, E Filipinská, P Ventruba
OBJECTIVE: To present current options and own experiences with ovarian stimulation in young women with breast cancer before gonadotoxic therapy. DESIGN: Review article with own experiencies. METHODS: Literary search, analysis of own experiences with complex therapy in women with breast cancer planning pregnancy, definitions of stimulating protocols, using methods of assisted reproduction. SETTING: Department of Obstetrics and Gynecology, Faculty of Medicine, Masaryk University and University Hospital Brno...
2017: Ceská Gynekologie
https://www.readbyqxmd.com/read/28923708/enhanced-in%C3%A2-vitro-maturation-of-canine-oocytes-by-oviduct-epithelial-cell-co-culture
#17
Jingu No, Minghui Zhao, Seunghoon Lee, Sun A Ock, Yoonseok Nam, Tai-Young Hur
Canine-assisted reproductive techniques have been successful for several years; however, the lack of an oocyte in vitro maturation system has limited their application. The aim of this study was to evaluate the effect of canine oviduct epithelial cells (cOECs) on canine oocyte maturation in vitro. Specifically, the method used for isolation of cOECs did not affect the expression of epithelial markers, E-cadherin and cytokeratin, on fresh, cultured and cryopreserved cells. Moreover, BrdU analysis showed that cOECs cultured in Medium 171 supplemented with mammary epithelial growth supplement were more proliferative than counterparts in advanced Dulbecco's modified Eagle medium or Medium 199...
September 6, 2017: Theriogenology
https://www.readbyqxmd.com/read/28923285/patient-and-cycle-characteristics-predicting-high-pregnancy-rates-with-single-embryo-transfer-an-analysis-of-the-society-for-assisted-reproductive-technology-outcomes-between-2004-and-2013
#18
Jennifer Mersereau, Jamie Stanhiser, Charles Coddington, Tiffany Jones, Barbara Luke, Morton B Brown
OBJECTIVE: To analyze factors associated with high live birth rate and low multiple birth rate in fresh and frozen-thawed assisted reproductive technology (ART) cycles. DESIGN: Retrospective cohort analysis. SETTING: Not applicable. PATIENT(S): The study population included 181,523 women undergoing in vitro fertilization with autologous fresh first cycles, 27,033 with fresh first oocyte donor cycles, 37,658 with fresh second cycles, and 35,446 with frozen-thawed second cycles...
September 15, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28923284/fertility-outcome-and-information-on-fertility-issues-in-individuals-with-different-forms-of-disorders-of-sex-development-findings-from-the-dsd-life-study
#19
Jolanta Słowikowska-Hilczer, Angelica Lindén Hirschberg, Hedi Claahsen-van der Grinten, Nicole Reisch, Claire Bouvattier, Ute Thyen, Peggy Cohen Kettenis, Robert Roehle, Birgit Köhler, Anna Nordenström
OBJECTIVE: To investigate fertility outcome in individuals with different forms of disorders of sex development (DSD), if assisted reproductive technology (ART) was used, and the patients' satisfaction with the information they had received. DESIGN: A cross-sectional multicenter study, dsd-LIFE. SETTING: Not applicable. PATIENT(S): A total of 1,040 patients aged ≥16 years with different DSD diagnoses participated...
September 15, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28923067/a-new-insight-into-male-fertility-preservation-for-patients-with-completely-immotile-spermatozoa
#20
Huanhua Chen, Guixue Feng, Bo Zhang, Hong Zhou, Caizhu Wang, Jinhui Shu, Xianyou Gan, Ruoyun Lin, Dongmei Huang, Yingqin Huang
BACKGROUND: Sperm cryopreservation is the most effective method to preserve male fertility but this is normally used for motile spermatozoa. Thus, only motile spermatozoa are used for cryopreservation in most reproductive medicine centers worldwide. The immotile spermatozoa from some problematic patients are usually discarded, resulting in a missed opportunity of sterility cryopreservation for future assisted reproductive treatments. Many studies have shown that successful fertilization can be obtained after selection of viable sperm from the completely immotile spermatozoa before ICSI...
September 18, 2017: Reproductive Biology and Endocrinology: RB&E
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