Fernando Zegers-Hochschild
Diego Portales University
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Featured researches published by Fernando Zegers-Hochschild.
Human Reproduction | 2009
Fernando Zegers-Hochschild; G.D. Adamson; J. de Mouzon; Osamu Ishihara; Ragaa T. Mansour; Karl-Gösta Nygren; Elizabeth A. Sullivan; S. van der Poel
BACKGROUND Many definitions used in medically assisted reproduction (MAR) vary in different settings, making it difficult to standardize and compare procedures in different countries and regions. With the expansion of infertility interventions worldwide, including lower resource settings, the importance and value of a common nomenclature is critical. The objective is to develop an internationally accepted and continually updated set of definitions, which would be utilized to standardize and harmonize international data collection, and to assist in monitoring the availability, efficacy, and safety of assisted reproductive technology (ART) being practiced worldwide. METHOD Seventy-two clinicians, basic scientists, epidemiologists and social scientists gathered together at the WHO headquarters in Geneva, Switzerland in December, 2008. Several months in advance, three working groups were established which were responsible for terminology in three specific areas: clinical conditions and procedures, laboratory procedures and outcome measures. Each group reviewed the existing ICMART glossary, made recommendations for revisions and introduced new terms to be considered for glossary expansion. RESULTS A consensus was reached on 87 terms, expanding the original glossary by 34 terms, which included definitions for numerous clinical and laboratory procedures. Special emphasis was placed in describing outcome measures such as cumulative delivery rates and other markers of safety and efficacy in ART. CONCLUSIONS Standardized terminology should assist in analysis of worldwide trends in MAR interventions and in the comparison of ART outcomes across countries and regions. This glossary will contribute to a more standardized communication among professionals responsible for ART practice, as well as those responsible for national, regional and international registries.
Fertility and Sterility | 2009
Fernando Zegers-Hochschild; G.D. Adamson; J. de Mouzon; Osamu Ishihara; Ragaa T. Mansour; Karl-Gösta Nygren; Elizabeth A. Sullivan; S. Vanderpoel
OBJECTIVE Many definitions used in medically assisted reproduction (MAR) vary in different settings, making it difficult to standardize and compare procedures in different countries and regions. With the expansion of infertility interventions worldwide, including lower resource settings, the importance and value of a common nomenclature is critical. The objective is to develop an internationally accepted and continually updated set of definitions, which would be utilized to standardize and harmonize international data collection, and to assist in monitoring the availability, efficacy, and safety of assisted reproductive technology (ART) being practiced worldwide. METHOD Seventy-two clinicians, basic scientists, epidemiologists and social scientists gathered together at the World Health Organization headquarters in Geneva, Switzerland, in December 2008. Several months before, three working groups were established as responsible for terminology in three specific areas: clinical conditions and procedures, laboratory procedures, and outcome measures. Each group reviewed the existing International Committee for Monitoring Assisted Reproductive Technology glossary, made recommendations for revisions and introduced new terms to be considered for glossary expansion. RESULT(S) A consensus was reached on 87 terms, expanding the original glossary by 34 terms, which included definitions for numerous clinical and laboratory procedures. Special emphasis was placed in describing outcome measures, such as cumulative delivery rates and other markers of safety and efficacy in ART. CONCLUSION(S) Standardized terminology should assist in analysis of worldwide trends in MAR interventions and in the comparison of ART outcomes across countries and regions. This glossary will contribute to a more standardized communication among professionals responsible for ART practice, as well as those responsible for national, regional, and international registries.
Human Reproduction | 2009
Jacques de Mouzon; Paul Lancaster; Karl G. Nygren; Elisabeth Sullivan; Fernando Zegers-Hochschild; Ragaa T. Mansour; Osamu Ishihara; David Adamson
The International Committee for Monitoring Assisted Reproductive Technologys (ICMART) Eighth World Report analyzes assisted reproductive technology (ART) practice and results for the year 2002 from 53 countries by type of ART, womens age, number of embryos transferred and multiple births. Over 601,243 initiated cycles resulted in a delivery rate (DR) per aspiration of 22.4% for conventional IVF, 21.2% for ICSI and a DR per transfer of 15.3% for frozen embryo transfer. For conventional IVF and ICSI, there was an overall twin rate of 25.7% per delivery and a triplet rate of 2.5%. The number of babies born worldwide through ART in 2002 was estimated to range between 219,000 and 246,000. There were wide variations in availability, DRs and multiple birth rates across the countries. Compared with the previous report (year 2000), there was a large increase in the number of cycles and a slight increase in the DR. There was a marginal decline in the mean number of embryos transferred and in the multiple DRs.
Human Reproduction | 2016
S.J. Dyer; Georgina M. Chambers; J. de Mouzon; K.G. Nygren; Fernando Zegers-Hochschild; Ragaa T. Mansour; Osamu Ishihara; Manish Banker; G.D. Adamson
STUDY QUESTION What were utilization, outcomes and practices in assisted reproductive technology (ART) globally in 2008, 2009 and 2010? SUMMARY ANSWER Global utilization and effectiveness remained relatively constant despite marked variations among countries, while the rate of single and frozen embryo transfers (FETs) increased with a concomitant slight reduction in multiple birth rates. WHAT IS KNOWN ALREADY ART is widely practised in all regions of the world. Monitoring utilization, an approximation of availability and access, as well as effectiveness and safety is an important component of universal access to reproductive health. STUDY DESIGN, SIZE, DURATION This is a retrospective, cross-sectional survey on utilization, effectiveness and safety of ART procedures performed globally from 2008 to 2010. PARTICIPANTS, SETTING, METHODS Between 58 and 61 countries submitted data from a total of nearly 2500 ART clinics each year. Aggregate country data were processed and analyzed based on forms and methods developed by the International Committee for Monitoring Assisted Reproductive Technologies (ICMART). Results are presented at country, regional and global level. MAIN RESULTS AND THE ROLE OF CHANCE For the years 2008, 2009 and 2010, >4 461 309 ART cycles were initiated, resulting in an estimated 1 144 858 babies born. The number of aspirations increased by 6.4% between 2008 and 2010, while FET cycles increased by 27.6%. Globally, ART utilization remained relatively constant at 436 cycles/million in 2008 and 474 cycles/million population in 2010, but with a wide country range of 8-4775 cycles/million population. ICSI remained constant at around 66% of non-donor aspiration cycles. The IVF/ICSI combined delivery rate (DR) per fresh aspiration was 19.8% in 2008; 19.7% in 2009 and 20.0% in 2010, with corresponding DRs for FET of 18.8, 19.7 and 20.7%. In fresh non-donor cycles, single embryo transfer increased from 25.7% in 2008 to 30.0% in 2010, while the average number of embryos transferred fell from 2.1 to 1.9, again with wide regional variation. The rates of twin deliveries following fresh non-donor transfers were, in 2008, 2009 and 2010, 21.8, 20.5 and 20.4%, respectively, with a corresponding triplet rate of 1.3, 1.0 and 1.1%. Fresh IVF and ICSI carried a perinatal mortality rate per 1000 births of 22.8 (2008), 19.2 (2009) and 21.0 (2010), compared with 15.1, 12.8 and 14.6/1000 births following FET in the same periods of observation. The proportion of women aged 40 years or older undergoing non-donor ART increased from 20.8 to 23.2% from 2008 to 2010. LIMITATIONS, REASON FOR CAUTION The data presented are reliant on the quality and completeness of data submitted by individual countries. This report covers approximately two-thirds of the world ART activity. WIDER IMPLICATIONS OF FINDINGS The ICMART World Reports provide the most comprehensive global statistical census and review of ART utilization, effectiveness, safety and quality. While ART treatment continues to increase globally, the wide disparities in access to treatment and embryo transfer practices warrant attention by clinicians and policy makers. STUDY FUNDING/COMPETING INTERESTS The authors declare no conflict of interest and no specific support from any organizations in relation to this manuscript. ICMART acknowledges financial support from the following organizations: American Society for Reproductive Medicine; European Society for Human Reproduction and Embryology; Fertility Society of Australia; Japan Society for Reproductive Medicine; Japan Society of Fertilization and Implantation; Red Latinoamericana de Reproduccion Asistida; Society for Assisted Reproductive Technology; Government of Canada (Research grant), Ferring Pharmaceuticals (Grant unrelated to World Reports). TRIAL REGISTRATION not applicable.
Journal of Ultrasound in Medicine | 2003
Cecilia Fabres; Guillermo Aviles; Carlos De La Jara; Juan Escalona; Jorge Felipe Muñoz; Antonio MacKenna; Carlos Fernandez; Fernando Zegers-Hochschild; Emilio Fernández
Objective. We sought (1) to describe an anatomic defect of the uterine cavity in the anterior isthmus diagnosed by transvaginal sonography in a group of premenopausal women with previous cesarean deliveries, (2) to establish whether there is an association between the presence of the pouch and a bleeding disturbance, and (3) to compare the diagnostic efficacy of transvaginal sonography versus hysteroscopy for the detection of this defect. Methods. We performed a retrospective study of 92 premenopausal women with histories of at least 1 cesarean delivery. Age, number of previous cesarean deliveries, time elapsed between last cesarean delivery and first consultation, and total area of the pouch were recorded in groups of women with and without abnormal bleeding. Hysteroscopy was also performed in 43.8% of the patients who had abnormal bleeding. Results. In all women, transvaginal sonography revealed the presence of a pouch on the anterior uterine segment at the site of the expected previous cesarean delivery scar. Hysteroscopy showed 100% correlation with transvaginal sonography in detection of this pouch. Conclusions. The high correlation between bleeding disturbances and the presence of a pouch, in the absence of other pathologic entities, suggests this anatomic defect as the possible cause, especially in view of the fact that women who had heavier and longer bleeding episodes tended to have a larger pouch. Transvaginal sonography is a very simple, noninvasive, low‐cost examination that should be considered as the first choice for screening, because it highly correlates (100%) with hysteroscopy in the diagnosis of this defect and may help rule out other causes.
Fertility and Sterility | 2010
Karl G. Nygren; David Adamson; Fernando Zegers-Hochschild; Jacques de Mouzon
OBJECTIVE To collect data on the prevalence and reasons for cross-border fertility care (CBFC). DESIGN Retrospective survey conducted by the International Committee Monitoring Assisted Reproductive Technologies. SETTING Forty-nine countries who have previously participated with the International Committee Monitoring Assisted Reproductive Technologies. PATIENT(S) Number of CBFC patients per country. INTERVENTION(S) Questionnaire. MAIN OUTCOME MEASURE(S) Number of CBFC patients and reason for travel. RESULT(S) The majority of replies were comprised of estimates for incoming and outgoing patients having CBFC. The main reasons for leaving a home country for CBFC included treatment anonymity and legality issues, whereas incoming patients most often traveled due to efficacy and access. CONCLUSION(S) Few countries are able to quantify numbers of patients having CBFC, although our data suggest that incoming treatment seekers are more easily numerated due to clinic registration procedures. Standardization of data collection and creation of national databases are needed to collect quantitative information that will help reproductive caregivers to provide support for patients having CBFC.
Fertility and Sterility | 2011
Osamu Ishihara; G. David Adamson; Silke Dyer; Jacques de Mouzon; Karl G. Nygren; Elizabeth A. Sullivan; Fernando Zegers-Hochschild; Ragaa T. Mansour
OBJECTIVE To analyze information on assisted reproductive technology (ART) performed worldwide, and trends in outcomes over successive years. DESIGN Cross-sectional survey on access, efficiency, and safety of ART procedures performed in 55 countries during 2007. SETTING Not applicable. PATIENT(S) Infertile women and men undergoing ART globally. INTERVENTION(S) Collection and analysis of international ART data. MAIN OUTCOME MEASURE(S) Number of cycles performed, by country and region, including pregnancies, single and multiple birth rates, and perinatal mortality. RESULT(S) Overall, >1,251,881 procedures with ART were reported, and resulted in 229,442 reported babies born. The availability of ART varied by country, from 12 to 4,140 treatments per million population. Of all aspiration cycles, 65.2% (400,617 of 614,540) were intracytoplasmic sperm injection. The overall delivery rate per fresh aspiration was 20.3%, and for frozen-embryo transfer (FET), 18.4%, with a cumulative delivery rate of 25.8%. With wide regional variations, single-embryo transfer represented 23.4% of fresh transfers, and the proportion of deliveries with twins and triplets from fresh transfers was 22.3% and 1.2%, respectively. The perinatal mortality rate was 19.9 per 1,000 births for fresh in vitro fertilization using intracytoplasmic sperm injection, and 9.6 per 1,000 for FET. The proportion of women aged ≥40 years increased to 19.8% from 15.5% in 2006. CONCLUSION(S) The international trend toward <3 transferred embryos continued, as did the wider uptake of FET. This was achieved without compromising delivery rates. The application of ART for women aged >40 years was a major component of ART services in some regions and countries.
Fertility and Sterility | 2014
Georgina M. Chambers; Van Phuong Hoang; Elizabeth A. Sullivan; Michael Chapman; Osamu Ishihara; Fernando Zegers-Hochschild; Karl G. Nygren; G. David Adamson
OBJECTIVE To systematically quantify the impact of consumer cost on assisted reproduction technology (ART) utilization and numbers of embryos transferred. DESIGN Ordinary least squared (OLS) regression models were constructed to measure the independent impact of ART affordability-measured as consumer cost relative to average disposable income-on ART utilization and embryo transfer practices. SETTING Not applicable. PATIENT(S) Women undergoing ART treatment. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) OLS regression coefficient for ART affordability, which estimates the independent effect of consumer cost relative to income on utilization and number of embryos transferred. RESULT(S) ART affordability was independently and positively associated with ART utilization with a mean OLS coefficient of 0.032. This indicates that, on average, a decrease in the cost of a cycle of 1 percentage point of disposable income predicts a 3.2% increase in utilization. ART affordability was independently and negatively associated with the number of embryos transferred, indicating that a decrease in the cost of a cycle of 10 percentage points of disposable income predicts a 5.1% increase in single-embryo transfer cycles. CONCLUSION(S) The relative cost that consumers pay for ART treatment predicts the level of access and number of embryos transferred. Policies that affect ART funding should be informed by these findings to ensure equitable access to treatment and clinically responsible embryo transfer practices.
Journal of The American Association of Gynecologic Laparoscopists | 1996
Cecilia Fabres; Veronica Alam; Jose P. Balmaceda; Fernando Zegers-Hochschild; Antonio MacKenna; Emilio Fernández
Transvaginal ultrasound is a noninvasive diagnostic technique that remains to be proved as accurate as hysteroscopy in the diagnosis of benign intrauterine lesions. We compared its efficacy with that of hysteroscopy in the diagnosis of benign intrauterine pathology in 126 infertile women in whom the diagnosis was confirmed by histologic studies. The women had a complete evaluation with preoperative transvaginal ultrasound, hysteroscopy, and histologic analysis of uterine cavity specimens. Sensivity, specificity, and predictive values were calculated for ultrasound and hysteroscopy considering the histologic study as 100%. Sensivity was 95% and 100%, and specificity 97.4% and 93.7% for transvaginal ultrasound and hysteroscopy, respectively. The positive predictive value for benign intrauterine lesions was 100% for ultrasound and 89.8% for hysteroscopy. The most frequent intrauterine lesions found were polyps and myomas. Transvaginal ultrasound is a valuable method of diagnosing benign intrauterine lesions in infertile women, and is especially important as a noninvasive technique to plan hysteroscopic surgery.
Human Reproduction | 2017
Fernando Zegers-Hochschild; G. David Adamson; Silke Dyer; Catherine Racowsky; Jacques de Mouzon; Rebecca Z. Sokol; Laura Rienzi; Arne Sunde; Lone Schmidt; I.D. Cooke; Joe Leigh Simpson; Sheryl van der Poel
Abstract STUDY QUESTION Can a consensus and evidence-driven set of terms and definitions be generated to be used globally in order to ensure consistency when reporting on infertility issues and fertility care interventions, as well as to harmonize communication among the medical and scientific communities, policy-makers, and lay public including individuals and couples experiencing fertility problems? SUMMARY ANSWER A set of 283 consensus-based and evidence-driven terminologies used in infertility and fertility care has been generated through an inclusive consensus-based process with multiple stakeholders. WHAT IS KNOWN ALREADY In 2006 the International Committee for Monitoring Assisted Reproductive Technologies (ICMART) published a first glossary of 53 terms and definitions. In 2009 ICMART together with WHO published a revised version expanded to 87 terms, which defined infertility as a disease of the reproductive system, and increased standardization of fertility treatment terminology. Since 2009, limitations were identified in several areas and enhancements were suggested for the glossary, especially concerning male factor, demography, epidemiology and public health issues. STUDY DESIGN, SIZE, DURATION Twenty-five professionals, from all parts of the world and representing their expertise in a variety of sub-specialties, were organized into five working groups: clinical definitions; outcome measurements; embryology laboratory; clinical and laboratory andrology; and epidemiology and public health. Assessment for revisions, as well as expansion on topics not covered by the previous glossary, were undertaken. A larger group of independent experts and representatives from collaborating organizations further discussed and assisted in refining all terms and definitions. PARTICIPANTS/MATERIALS, SETTING, METHODS Members of the working groups and glossary co-ordinators interacted through electronic mail and face-to-face in international/regional conferences. Two formal meetings were held in Geneva, Switzerland, with a final consensus meeting including independent experts as well as observers and representatives of international/regional scientific and patient organizations. MAIN RESULTS AND THE ROLE OF CHANCE A consensus-based and evidence-driven set of 283 terminologies used in infertility and fertility care was generated to harmonize communication among health professionals and scientists as well as the lay public, patients and policy makers. Definitions such as ‘fertility care’ and ‘fertility awareness’ together with terminologies used in embryology and andrology have been introduced in the glossary for the first time. Furthermore, the definition of ‘infertility’ has been expanded in order to cover a wider spectrum of conditions affecting the capacity of individuals and couples to reproduce. The definition of infertility remains as a disease characterized by the failure to establish a clinical pregnancy; however, it also acknowledges that the failure to become pregnant does not always result from a disease, and therefore introduces the concept of an impairment of function which can lead to a disability. Additionally, subfertility is now redundant, being replaced by the term infertility so as to standardize the definition and avoid confusion. LIMITATIONS, REASONS FOR CAUTION All stakeholders agreed to the vast majority of terminologies included in this glossary. In cases where disagreements were not resolved, the final decision was reached after a vote, defined before the meeting as consensus if passed with 75%. Over the following months, an external expert group, which included representatives from non-governmental organizations, reviewed and provided final feedback on the glossary. WIDER IMPLICATIONS OF THE FINDINGS Some terminologies have different definitions, depending on the area of medicine, for example demographic or clinical as well as geographic differences. These differences were taken into account and this glossary represents a multinational effort to harmonize terminologies that should be used worldwide. STUDY FUNDING/COMPETING INTERESTS None. TRIAL REGISTRATION NUMBER N/A.