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fertility and reproduction

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https://www.readbyqxmd.com/read/29331083/variation-in-reproductive-outcomes-of-women-with-histories-of-bulimia-nervosa-anorexia-nervosa-or-eating-disorder-not-otherwise-specified-relative-to-the-general-population-and-closest-aged-sisters
#1
Jennifer Tabler, Rebecca L Utz, Ken R Smith, Heidi A Hanson, Claudia Geist
OBJECTIVE: This study seeks to examine the long-term reproductive consequences of eating disorders (ED), to assess variation in reproductive outcomes by ED type, and to examine reproductive differences between women with previous ED diagnosis and their discordant sisters. METHOD: Using a sample of women with previous ED diagnosis generated by the Utah Population Database, this study compares the fecundity (parity) and age at first birth of women by ED subtype (bulimia nervosa [BN], anorexia nervosa [AN], and ED not otherwise specified [EDNOS]) (n = 1,579)...
January 13, 2018: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/29331044/journey-of-oocyte-from-metaphase-i-to-metaphase-ii-stage-in-mammals
#2
Alka Sharma, Meenakshi Tiwari, Anumegha Gupta, Ashutosh N Pandey, Pramod K Yadav, Shail K Chaube
In mammals, journey from metaphase-I (M-I) to metaphase-II (M-II) is important since oocyte extrude first polar body (PB-I) and gets converted into haploid gamete. The molecular and cellular changes associated with meiotic cell cycle progression from M-I to M-II stage and extrusion of PB-I remain ill understood. Several factors drive oocyte meiosis from M-I to M-II stage. The mitogen-activated protein kinase3/1 (MAPK3/1), signal molecules and Rho family GTPases act through various pathways to drive cell cycle progression from M-I to M-II stage...
January 13, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29330334/detection-of-heterozygous-mutation-in-hook-microtubule-tethering-protein-1-in-three-patients-with-decapitated-and-decaudated-spermatozoa-syndrome
#3
Huixing Chen, Yong Zhu, Zijue Zhu, Erlei Zhi, Keming Lu, Xiaobo Wang, Feng Liu, Zheng Li, Weiliang Xia
BACKGROUND: The mechanism of intramanchette transport is crucial to the transformation of sperm tail and the nuclear condensation during spermiogenesis. Although few dysfunctional proteins could result in abnormal junction between the head and tail of spermatozoon, little is known about the genetic cues in this process. OBJECTIVE: Based on patients with severe decapitated and decaudated spermatozoa (DDS) syndrome, the study aimed to validate whether new mutation exists on their Hook microtubule-tethering protein 1 (HOOK1) genes and follow their results of assisted reproduction treatment (ART)...
January 12, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29330018/testicular-adrenal-rest-tumor-screening-and-fertility-counseling-among-males-with-congenital-adrenal-hyperplasia
#4
Monika Chaudhari, Emilie K Johnson, Daniel DaJusta, Leena Nahata
BACKGROUND: Reduced fertility is a common potential problem among males with congenital adrenal hyperplasia (CAH), with nearly half experiencing impaired sperm production. The major cause of oligo/azoospermia in CAH is testicular adrenal rest tumors (TARTs). Studies indicate that ultrasound screening for TARTs should begin during childhood, yet it remains unclear whether boys with CAH are routinely screened for TARTs and/or counseled about infertility risk and potential interventions such as fertility testing and/or preservation...
December 21, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/29329412/lhx8-ablation-leads-to-massive-autophagy-of-mouse-oocytes-associated-with-dna-damage
#5
Emanuele Pelosi, Laura D'Ignazio, Marc Michel, Melissa Beyer, Kassimier Thompson, Antonino Forabosco, David Schlessinger
Following proliferation of oogonia in mammals, great numbers of germ cells are discarded, primarily by apoptosis, while the remainder form primordial follicles (the ovarian reserve) that determine fertility and reproductive lifespan. More massive, rapid, and essentially total loss of oocytes, however, occurs when the transcription factor Lhx8 is ablated-though the cause and mechanism of germ cell loss from the Lhx8-/- ovaries has been unknown. We found that Lhx8-/- ovaries maintain the same number of germ cells throughout embryonic development; rapid decrease in the pool of oocytes starts shortly before birth...
January 10, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29327510/zmstk1-and-zmstk2-encoding-receptor-like-cytoplasmic-kinase-are-involved-in-maize-pollen-development-with-additive-effect
#6
Mingxia Fan, Chunyu Zhang, Lei Shi, Chen Liu, Wenjuan Ma, Meiming Chen, Kuichen Liu, Fengchun Cai, Guohong Wang, Zhengyi Wei, Min Jiang, Zaochang Liu, Ansar Javeed, Feng Lin
Pollen germination and pollen tube growth are important physiological processes of sexual reproduction of plants, and also are involved in signal transduction. Our previous study reveals that ZmSTK1 and ZmSTK2 are two receptor-like cytoplasmic kinases (RLCK) homologs in Zea mays as members of receptor-like protein kinase (RLK) subfamily, sharing 86% identity at the amino acid level. Here, we report that ZmSTK1 and ZmSTK2, expressed at late stages of pollen development, regulate maize pollen development with additive effect...
January 11, 2018: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29326167/the-protein-kinase-ck2-substrate-jabba-modulates-lipid-metabolism-during-drosophila-oogenesis
#7
Emily A McMillan, Sheila M Longo, Michael D Smith, Sarah Broskin, Baicheng Lin, Nisha K Singh, Todd I Strochlic
Lipid metabolism plays a critical role in female reproduction. During oogenesis, maturing oocytes accumulate high levels of neutral lipids that are essential for both energy production and for the synthesis of other lipid molecules. Metabolic pathways within the ovary are partially regulated by protein kinases that link metabolic status to oocyte development. While the functions of several kinases in this process are well established, the roles that many other kinases play in coordinating metabolic state with female germ cell development are unknown...
January 11, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29324596/preterm-delivery-and-low-birth-weight-among-neonates-conceived-with-intracytoplasmic-sperm-injection-compared-with-conventional-in-vitro-fertilization
#8
Sanaz Keyhan, Tracy Truong, Yi-Ju Li, Tia Jackson-Bey, Jennifer L Eaton
OBJECTIVE: To examine the prevalence of prematurity and low birth weight (LBW) among singletons conceived with intracytoplasmic sperm injection (ICSI) compared with those conceived with conventional in vitro fertilization (IVF). METHODS: Using the Society for Assisted Reproductive Technology Clinic Outcomes Reporting System, we conducted a retrospective cohort study of women undergoing a first, fresh autologous ICSI or conventional IVF cycle from 2004 to 2013. Singleton live births were included in the analysis...
January 9, 2018: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29323793/atmospheric-nitrogen-deposition-on-petals-enhances-seed-quality-of-the-forest-herb-anemone-nemorosa
#9
Pieter De Frenne, Haben Blondeel, Jörg Brunet, Maria Mercedes Caron, Olivier Chabrerie, Mathias Cougnon, Sara A O Cousins, Guillaume Decocq, Martin Diekmann, Bente J Graae, Mick E Hanley, Thilo Heinken, Martin Hermy, Annette Kolb, Jonathan Lenoir, Jaan Liira, Anna Orczewska, Anna Shevtsova, Thomas Vanneste, Kris Verheyen
Elevated atmospheric input of nitrogen (N) is currently affecting plant biodiversity and ecosystem functioning. The growth and survival of numerous plant species is known to respond strongly to N fertilization. Yet, few studies have assessed the effects of N deposition on seed quality and reproductive performance, which is an important life-history stage of plants. Here we address this knowledge gap by assessing the effects of atmospheric N deposition on seed quality of the ancient forest herb Anemone nemorosa using two complementary approaches...
January 11, 2018: Plant Biology
https://www.readbyqxmd.com/read/29323576/preserving-the-reproductive-potential-of-transgender-and-intersex-people
#10
Sam Rowlands, Jean-Jacques Amy
BACKGROUND: The bodies of some transgender and intersex people have been mutilated and their minds subjected to immense distress. Their gender has often been determined by others. Loss of fertility used to be considered an inevitable consequence of treatment. OBJECTIVE: To review the issue of preserving the reproductive potential of transgender and intersex people. METHODS: A narrative review based on a wide-ranging search of the literature in multiple disciplines...
January 11, 2018: European Journal of Contraception & Reproductive Health Care
https://www.readbyqxmd.com/read/29321918/reproductive-management-in-dairy-cows-the-future
#11
REVIEW
Mark A Crowe, Miel Hostens, Geert Opsomer
Background: Drivers of change in dairy herd health management include the significant increase in herd/farm size, quota removal (within Europe) and the increase in technologies to aid in dairy cow reproductive management. Main body: There are a number of key areas for improving fertility management these include: i) handling of substantial volumes of data, ii) genetic selection (including improved phenotypes for use in breeding programmes), iii) nutritional management (including transition cow management), iv) control of infectious disease, v) reproductive management (and automated systems to improve reproductive management), vi) ovulation / oestrous synchronisation, vii) rapid diagnostics of reproductive status, and viii) management of male fertility...
2018: Irish Veterinary Journal
https://www.readbyqxmd.com/read/29321878/asymmetric-reproductive-interference-the-consequences-of-cross-pollination-on-reproductive-success-in-sexual-apomictic-populations-of-potentilla-puberula-rosaceae
#12
Christoph Dobeš, Susanne Scheffknecht, Yulia Fenko, Dagmar Prohaska, Christina Sykora, Karl Hülber
Apomixis evolves from a sexual background and usually is linked to polyploidization. Pseudogamous gametophytic apomicts, which require a fertilization to initiate seed development, of various ploidy levels frequently co-occur with their lower-ploid sexual ancestors, but the stability of such mixed populations is affected by reproductive interferences mediated by cross-pollination. Thereby, reproductive success of crosses depends on the difference in ploidy levels of mating partners, that is, on tolerance of deviation from the balanced ratio of maternal versus paternal genomes...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321367/drosophila-pallidosa-whether-a-separate-species-or-a-light-form-of-d-ananassae
#13
B N Singh, Roshni Singh
Drosophila pallidosa belongs to the D. ananassae complex, which includes a total of 10 species. Earlier D. pallidosa was known as light form of D. ananassae but later it was described as a new species, sibling of D. ananassae. Both these terms, light form and sibling species were used by Futch. This makes the taxonomic status of D. pallidosa confusing. In this review we have tried to understand the actual status of this sibling species pair. Considering the similarities and dissimilarities, we suggest that D...
December 2017: Journal of Genetics
https://www.readbyqxmd.com/read/29320479/paternal-chromosome-loss-and-metabolic-crisis-contribute-to-hybrid-inviability-in-xenopus
#14
Romain Gibeaux, Rachael Acker, Maiko Kitaoka, Georgios Georgiou, Ila van Kruijsbergen, Breanna Ford, Edward M Marcotte, Daniel K Nomura, Taejoon Kwon, Gert Jan C Veenstra, Rebecca Heald
Hybridization of eggs and sperm from closely related species can give rise to genetic diversity, or can lead to embryo inviability owing to incompatibility. Although central to evolution, the cellular and molecular mechanisms underlying post-zygotic barriers that drive reproductive isolation and speciation remain largely unknown. Species of the African clawed frog Xenopus provide an ideal system to study hybridization and genome evolution. Xenopus laevis is an allotetraploid with 36 chromosomes that arose through interspecific hybridization of diploid progenitors, whereas Xenopus tropicalis is a diploid with 20 chromosomes that diverged from a common ancestor approximately 48 million years ago...
January 10, 2018: Nature
https://www.readbyqxmd.com/read/29320450/nitrogen-nutrition-of-fruit-trees-to-reconcile-productivity-and-environmental-concerns
#15
Corina Carranca, Gustavo Brunetto, Massimo Tagliavini
Although perennial fruit crops represent 1% of global agricultural land, they are of a great economic importance in world trade and in the economy of many regions. The perennial woody nature of fruit trees, their physiological stages of growth, the root distribution pattern, and the presence of herbaceous vegetation in alleys make orchard systems efficient in the use and recycling of nitrogen (N). The present paper intends to review the existing literature on N nutrition of young and mature deciduous and evergreen fruit trees with special emphasis to temperate and Mediterranean climates...
January 10, 2018: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29319911/genomic-islands-of-differentiation-in-two-songbird-species-reveal-candidate-genes-for-hybrid-female-sterility
#16
Libor Mořkovský, Václav Janoušek, Jiří Reif, Jakub Rídl, Jan Pačes, Lukáš Choleva, Karel Janko, Michael W Nachman, Radka Reifová
Hybrid sterility is a common first step in the evolution of postzygotic reproductive isolation. According to Haldane's Rule it affects predominantly the heterogametic sex. While the genetic basis of hybrid male sterility in organisms with heterogametic males has been studied for decades, the genetic basis of hybrid female sterility in organisms with heterogametic females has received much less attention. We investigated the genetic basis of reproductive isolation in two closely related avian species, the Common Nightingale (Luscinia megarhynchos) and the Thrush Nightingale (L...
January 10, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29318510/racial-and-ethnic-differences-in-pregnancy-rates-following-intrauterine-insemination-with-a-focus-on-american-indians
#17
LaTasha B Craig, Elizabeth A Weedin, William D Walker, Amanda E Janitz, Karl R Hansen, Jennifer D Peck
BACKGROUND: No research exists on American Indian pregnancy rates following infertility treatment. Most racial/ethnic fertility research has focused on pregnancy following in vitro fertilization, with only rare studies looking at intrauterine insemination (IUI). The objective of our study was to compare fecundability following IUI by race/ethnicity, with a special focus on American Indians. METHODS: This was a retrospective analysis of subjects undergoing IUI July 2007-May 2012 at a university-based infertility clinic...
January 9, 2018: Journal of Racial and Ethnic Health Disparities
https://www.readbyqxmd.com/read/29318466/combined-or-individual-effects-of-dietary-probiotic-pediococcus-acidilactici-and-nucleotide-on-reproductive-performance-in-goldfish-carassius-auratus
#18
Nooshin Mehdinejad, Mohammad Reza Imanpour, Valiollah Jafari
This work evaluated the effect of dietary supplementation of probiotic, Pediococcus acidilactici and nucleotide (combined or individual) on reproductive performance including semen quality (motility and density) and egg indices (egg diameter, ovum diameter, absolute fecundity, relative fecundity, gonadosomatic index, hepatosomatic index, fertilization rate, and hatching rate) in goldfish (Carassius auratus). Fish (46.9 ± 2.15 g) were acclimatized and divided into eight experimental diets supplemented with P...
January 9, 2018: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/29317123/c-reactive-protein-in-relation-to-fecundability-and-anovulation-among-eumenorrheic-women
#19
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...
January 6, 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29316601/bariatric-surgery-and-infertility-a-prospective-study
#20
Vincenzo Consalvo, Antonio Canero, Vincenzo Salsano
BACKGROUND: Obesity is a worldwide disease affecting 13% of the world's adult female population. The reasons and the fetal risk are still unclear. The effect of weight loss as a result of bariatric surgery seems to induce an improvement in fertility in obese women. The main purpose of this prospective study is to demonstrate if there is an association between bariatric surgery-induced weight loss and an improvement in the fertility of women at reproductive age. MATERIALS AND METHODS: From June 2013 to April 2016, all bariatric female patients from our institutes were prospectively evaluated for suitability in this study...
December 22, 2017: Surgical Technology International
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