1,720,971 research outputs found
Ovarian stimulation protocols based on follicle – stimulating hormone glycosilation pattern: impact on oocyte quality and clinical outcome.
No full textPregnancies and deliveries after injection of vitrified-warmed oocytes with cryopreserved testicular sperm.
No full textThe purpose of this study is to report successful pregnancies and deliveries from embryos derived from vitrified-warmed oocytes injected with frozen-thawed testicular sperm. After the vitrification-warming procedure, surviving oocytes from 11 patients were microinjected with thawed testicular spermatozoa, and subsequent viable cleaving embryos were transferred, resulting in four clinical pregnancies. Copyright © 2010 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved
Impact of physician performing embryo transfer on pregnancy rates in an assisted reproductive program
No full textPurpose : To evaluate the effect of the individual physician performing embryo transfer, on clinical pregnancy rates. Method : Data from a total of 485 consecutive embryo transfers performed on 485 women aged 23-37 years were prospectively collected for this study. All patients underwent a standard downregulation long protocol for ovarian stimulation. Oocyte recovery was performed at 36 h after hCG administration. Embryo transfer took place at 48 h after insemination. The patients were matched in two groups that have been linked to two different ET providers (A and B). The same method of loading embryos into the embryo transfer catheter was used. Results : Clinical pregnancy rates varied significantly (p <= 0.01) between the two providers: 36.1% in group A and 20.6% in group B. The number and quality of embryos transferred did not differ between the groups. Conclusion : The results suggest that the physician factor may be an important variable in embryo transfer technique
Simultaneous administration of human acidic and recombinant less acidic follicle-stimulating hormone for ovarian stimulation improves oocyte and embryo quality, and clinical outcome in patients with repeated IVF failures.
No full textGonadotropin treatment of an azoospermic patient with a Y-chromosome microdeletion.
No full textOBJECTIVE:
To report on the treatment with recombinant FSH of an azoospermic normogonadotropic patient with a Y-chromosome microdeletion.
DESIGN:
Case report.
SETTING:
An assisted reproduction center.
PATIENT(S):
A 32-year-old patient with azoospermia.
INTERVENTION(S):
Histological testicular biopsy, Y-chromosome screening, FSH treatment, and intracytoplasmic sperm injection.
MAIN OUTCOME MEASURE(S):
Fertilization, embryo development, pregnancy, and delivery.
RESULT(S):
After 6 months of treatment with gonadotropins, a small number of spermatozoa were found in the patient's ejaculate and used for IVF, resulting in a successful twin pregnancy and the delivery of two healthy girls.
CONCLUSION(S):
In this study, treatment with gonadotropins promoted the spermatogenesis process and led to the production of spermatozoa in a normogonadotropic azoospermic patient.
PMID:
15237016
[PubMed - indexed for MEDLINE
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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