1,720,962 research outputs found
The effect on clinical results of adding recombinant LH in late phase of ovarian stimulation of patients with repeated implantation failure: a pilot study
No full textOBJECTIVE: To evaluate the efficacy of recombinant LH (r-LH) addition in the late phase of ovarian stimulation in patients with repeated implantation failure (RIF).PATIENTS AND METHODS: 66 infertile couples undergoing ICSI treatment due to male factor were allocated to group A (33) and to group B (33). Group A (29 subjects) received recombinant FSH (r-FSH) supplemented by r-LH in the late follicular phase starting the same day of GnRH-antagonist (GnRH-ant) administration, and group B (32 subjects) received r-FSH alone. All patients were stimulated with a GnRH-antflexible protocol starting r-FSH on day 2 of a spontaneous or induced cycle. hCG (10000 IU) was administered by intramuscular route when at least 2 follicles reached 18 mm in diameter.RESULTS: Metaphase II (MII) oocytes with cytoplasmic maturation showed a significant difference in the r-LH group (89.02%) compared to the one with FSH alone (81.15%) (p < 0.01). The number of positive pregnancy test, 14 (48.3%) and 8 (25%), was significantly greater in the r-LH group compared to the group treated with r-FSH alone (p < 0.03). The number of gestational sacs was 20 in the r-LH group vs. 9 in the r-FSH group (p < 0.001). The implantation rate was significantly higher in the r-LH group compared to the r-FSH only group (19% vs. 7% respectively; p < 0.01). Also, a lower abortion rate was found in the r-LH group (21% vs. 37.5% respectively - p < 0.01).CONCLUSIONS: Ovarian stimulation should be personalized because it seems that some subgroups of patients, like those with RIF, reach a better clinical outcome with the addition of r-LH in the advanced follicular phase stimulation
Suppression and recovery of gonadotropin and steroid secretion by a gonadotropin-releasing hormone receptor antagonist in healthy women with normal ovulation versus women with polycystic ovary syndrome in the early follicular phase
No full textObjective: To evaluate the effects of the GnRH antagonist cetrorelix on the gonadal axis in patients with polycystic ovary syndrome (PCOS). Design: Observational clinical study. Setting: Academic research center. Patient(s): Ten patients with PCOS and 10 controls with normal ovulation. Intervention(s): Patients received a daily cetrorelix injection (0.25 mg SC at 9:00 am) for 6 days, starting from day 3 of the menstrual cycle. Main Outcome Measure(s): Serum gonadotropin, E2, T, 17-OH-P, and androstenedione plasma levels were evaluated at baseline and at 12 and 24 hours after each daily injection. These hormones were also assayed at days 10, 12, and 14 of the menstrual cycle. Result(s): We observed in patients with PCOS a significantly higher suppression of FSH and LH for the entire length of therapy; LH recovery secretion was significantly higher in the PCOS group. Regarding androgens, we found a greater suppression of T. Androstenedione and 17-OH-P showed a trend toward a higher suppression in PCOS. Conclusion(s): Gonadotropin and androgen suppression by GnRH antagonist is more effective in PCOS than in controls, suggesting a higher sensitivity of GnRH receptors in PCOS to this drug. © 2009 American Society for Reproductive Medicine
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
- …
