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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

"Aspectos clínicos e genótipo do receptor do FSH na síndrome de hiperestímulo ovariano induzida por hCG" / Clinical aspects and genotype of the FSH receptor in hCG-induced ovarian hyperstimulation syndrome

Rocha, Catarina Brasil D'Avila 07 July 2006 (has links)
A síndrome de hiperestímulo ovariano (SHO) pode ocorrer de forma espontânea na gestação ou durante indução da ovulação para fertilização in vitro. Com o objetivo de identificar fatores clínicos e hormonais de risco para a SHO iatrogênica e analisar o papel das variantes alélicas do FSHR na sua etiologia, estudamos 29 pacientes com SHO iatrogênica moderada e grave. Idade < 33,5 anos, FSH basal < 5,2 UI/L e resposta de estradiol > 1757 pg/mL durante a estimulação ovariana atuaram como preditores independentes do risco de desenvolvimento da SHO iatrogênica, sendo a associação dos três fatores capaz de predizer a síndrome com acurácia de 78%. Não foram encontradas mutações nas 29 pacientes com SHO iatrogênica. Entretanto, o alelo Asn680 do polimorfismo Ser680Asn se associou às formas mais graves da SHO iatrogênica / Ovarian hyperstimulation syndrome (OHSS) can occur spontaneously during early pregnancy or as an iatrogenic complication in assisted reproductive medicine. The aim of this study was to identify clinical and hormonal risk factors for iatrogenic OHHS and to evaluate the role of allelic variants of the FSHR in the etiology of this syndrome. We studied 29 patients with moderate and severe iatrogenic OHHS. Age < 33.5 y, basal FSH < 5.2 U/L and estradiol response during ovarian stimulation > 1757 pg/mL were independent risk factors for iatrogenic OHSS and these three factors in association were able to predict the syndrome with accuracy of 78%. We did not find mutations in any patient studied. However, there was a predominance of the Asn680 allele of Ser680Asn polymorphism in patients with the most severe forms of the syndrome
2

"Aspectos clínicos e genótipo do receptor do FSH na síndrome de hiperestímulo ovariano induzida por hCG" / Clinical aspects and genotype of the FSH receptor in hCG-induced ovarian hyperstimulation syndrome

Catarina Brasil D'Avila Rocha 07 July 2006 (has links)
A síndrome de hiperestímulo ovariano (SHO) pode ocorrer de forma espontânea na gestação ou durante indução da ovulação para fertilização in vitro. Com o objetivo de identificar fatores clínicos e hormonais de risco para a SHO iatrogênica e analisar o papel das variantes alélicas do FSHR na sua etiologia, estudamos 29 pacientes com SHO iatrogênica moderada e grave. Idade < 33,5 anos, FSH basal < 5,2 UI/L e resposta de estradiol > 1757 pg/mL durante a estimulação ovariana atuaram como preditores independentes do risco de desenvolvimento da SHO iatrogênica, sendo a associação dos três fatores capaz de predizer a síndrome com acurácia de 78%. Não foram encontradas mutações nas 29 pacientes com SHO iatrogênica. Entretanto, o alelo Asn680 do polimorfismo Ser680Asn se associou às formas mais graves da SHO iatrogênica / Ovarian hyperstimulation syndrome (OHSS) can occur spontaneously during early pregnancy or as an iatrogenic complication in assisted reproductive medicine. The aim of this study was to identify clinical and hormonal risk factors for iatrogenic OHHS and to evaluate the role of allelic variants of the FSHR in the etiology of this syndrome. We studied 29 patients with moderate and severe iatrogenic OHHS. Age < 33.5 y, basal FSH < 5.2 U/L and estradiol response during ovarian stimulation > 1757 pg/mL were independent risk factors for iatrogenic OHSS and these three factors in association were able to predict the syndrome with accuracy of 78%. We did not find mutations in any patient studied. However, there was a predominance of the Asn680 allele of Ser680Asn polymorphism in patients with the most severe forms of the syndrome
3

Efeitos da bromocriptina na prevenção da síndrome do hiperestímulo ovariano precoce em mulheres de alto risco submetidas a fertilização in vitro / Effects of bromocriptine in the prevention of early ovarian hyperstimulation syndrome in high risk women submitted to in vitro fertilization

Ana Lucia Rocha Beltrame de Mello 03 December 2009 (has links)
Objetivo: Avaliar o uso da bromocriptina na prevenção da síndrome do hiperestímulo ovariano (SHO) precoce moderada ou grave em mulheres de alto risco submetidas a fertilização in vitro. Pacientes e Métodos: Estudo duplo-cego, prospectivo e randomizado, foi realizado entre fevereiro de 2006 e novembro de 2007 no Centro de Reprodução Humana da Divisão de Ginecologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, na Huntington Centro de Medicina Reprodutiva e no Centro de Reprodução Humana do Hospital e Maternidade Santa Joana. Foram estudadas 28 mulheres entre 20 e 39 anos de alto risco para desenvolver a SHO (presença de 20 folículos ou mais ao ultrassom transvaginal no dia anterior à administração de gonadotrofina coriônica humana (hCG); níveis séricos de estradiol no dia da administração do hCG ou previamente a esta data iguais ou maiores que 3000 pg/ml e/ou aumento significativo ovariano bilateral). Foram divididas randomicamente, em dois grupos: A (n=17) e B (n=11), que receberam, respectivamente, um comprimido diário de ácido fólico (2,0 mg) e de bromocriptina (2,5 mg), por via oral, durante 14 dias, com início no dia da administração de hCG. As pacientes foram avaliadas no dia da administração do hCG (D1) e sete dias após (D2), quando foram realizados : ultrassom abdominal para verificar a presença de ascite; coleta de sangue para dosagens séricas de hemoglobina, hematócrito, leucócitos, plaquetas, uréia, creatinina, TGO, TGP e do fator de crescimento endotelial vascular (VEGF), e coleta de urina de 24 h para determinação de clearance de creatinina e concentração urinária de sódio. Resultados: Da série total (28 pacientes) que concluíram todo o estudo, 14 apresentaram ascite em D2, das quais 10 pertenciam ao grupo A (58,8%) e 4 (36,4%) ao grupo B (p=0,246). Destas 14 pacientes, 7 preencheram os critérios de gravidade, sendo que 6 pertenciam ao grupo A e, somente uma, ao grupo B. Observou-se aumento dos valores médios de VEGF no Grupo A (134,93 pg/ml) em D2, enquanto no Grupo B, houve diminuição (119,11pg/ml) (p=0,462).Conclusões: A bromocriptina não preveniu a SHO precoce moderada ou grave em pacientes de alto risco submetidas a fertilização in vitro, no entanto, houve diminuição da quantidade de líquido intraperitoneal e dos níveis séricos de VEGF. / Objective: To evaluate the effect of bromocriptine for the prevention of either early moderate or severe ovarian hyperstimulation syndrome (OHSS) in high risk women submitted to in vitro fertilization. Patients and Methods: A double-blind, prospective, randomized study was carried out between February 2006 and November 2007 at the Human Reproduction Center, Department of Gynecology, Teaching Hospital of the School of Medicine, University of São Paulo, at the Huntington Center of Reproductive Medicine and at the Human Reproduction Center of Santa Joana Hospital and Maternity Home. Twenty-eight women between 20 and 39 years of age, considered high risk for the development of OHSS (presence of 20 follicles at transvaginal ultrasonography on the day prior to human chorionic gonadotrophin [hCG] administration; serum estradiol levels 3000 pg/ml prior to or on the day of hCG administration and/or a significant bilateral increase in ovarian diameter), were included. The participants were randomly allocated to one of two groups. Women in group A (n=17) took a 2.0 mg tablet of folic acid and women in group B (n=11) took a 2.5 mg tablet of bromocriptine. Both treatments were taken orally daily for 14 days beginning on the day of hCG administration. Patients were evaluated on the day of hCG administration (D1) and seven days later (D2) at which time the following tests were performed: abdominal ultrasonography to detect the presence of ascites; blood sampling for the assessment of hemoglobin, hematocrit, leukocytes, platelets, urea, creatinine, SGOT, SGPT and vascular endothelial growth factor (VEGF). In addition, a 24-hour urine sample was collected to determine creatinine clearance and urinary sodium concentration. Results: All patients concluded the study. Fourteen had ascites at D2, 10 in group A (58.8%) and 4 (36.4%) in group B (p=0.246). Of these 14 patients, 7 fulfilled the criteria for severe OHSS, 6 in group A and 1 in group B. An increase was identified in mean VEGF values in group A (134.93 pg/ml) at D2, while a reduction was found in group B (119.11 pg/ml) (p=0.462). Conclusions: Bromocriptine did neither prevent early moderate nor severe OHSS in high risk patients submitted to in vitro fertilization; however, a reduction occurred in the intraperitoneal fluid volume and in serum VEGF levels.
4

Efeitos da bromocriptina na prevenção da síndrome do hiperestímulo ovariano precoce em mulheres de alto risco submetidas a fertilização in vitro / Effects of bromocriptine in the prevention of early ovarian hyperstimulation syndrome in high risk women submitted to in vitro fertilization

Mello, Ana Lucia Rocha Beltrame de 03 December 2009 (has links)
Objetivo: Avaliar o uso da bromocriptina na prevenção da síndrome do hiperestímulo ovariano (SHO) precoce moderada ou grave em mulheres de alto risco submetidas a fertilização in vitro. Pacientes e Métodos: Estudo duplo-cego, prospectivo e randomizado, foi realizado entre fevereiro de 2006 e novembro de 2007 no Centro de Reprodução Humana da Divisão de Ginecologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, na Huntington Centro de Medicina Reprodutiva e no Centro de Reprodução Humana do Hospital e Maternidade Santa Joana. Foram estudadas 28 mulheres entre 20 e 39 anos de alto risco para desenvolver a SHO (presença de 20 folículos ou mais ao ultrassom transvaginal no dia anterior à administração de gonadotrofina coriônica humana (hCG); níveis séricos de estradiol no dia da administração do hCG ou previamente a esta data iguais ou maiores que 3000 pg/ml e/ou aumento significativo ovariano bilateral). Foram divididas randomicamente, em dois grupos: A (n=17) e B (n=11), que receberam, respectivamente, um comprimido diário de ácido fólico (2,0 mg) e de bromocriptina (2,5 mg), por via oral, durante 14 dias, com início no dia da administração de hCG. As pacientes foram avaliadas no dia da administração do hCG (D1) e sete dias após (D2), quando foram realizados : ultrassom abdominal para verificar a presença de ascite; coleta de sangue para dosagens séricas de hemoglobina, hematócrito, leucócitos, plaquetas, uréia, creatinina, TGO, TGP e do fator de crescimento endotelial vascular (VEGF), e coleta de urina de 24 h para determinação de clearance de creatinina e concentração urinária de sódio. Resultados: Da série total (28 pacientes) que concluíram todo o estudo, 14 apresentaram ascite em D2, das quais 10 pertenciam ao grupo A (58,8%) e 4 (36,4%) ao grupo B (p=0,246). Destas 14 pacientes, 7 preencheram os critérios de gravidade, sendo que 6 pertenciam ao grupo A e, somente uma, ao grupo B. Observou-se aumento dos valores médios de VEGF no Grupo A (134,93 pg/ml) em D2, enquanto no Grupo B, houve diminuição (119,11pg/ml) (p=0,462).Conclusões: A bromocriptina não preveniu a SHO precoce moderada ou grave em pacientes de alto risco submetidas a fertilização in vitro, no entanto, houve diminuição da quantidade de líquido intraperitoneal e dos níveis séricos de VEGF. / Objective: To evaluate the effect of bromocriptine for the prevention of either early moderate or severe ovarian hyperstimulation syndrome (OHSS) in high risk women submitted to in vitro fertilization. Patients and Methods: A double-blind, prospective, randomized study was carried out between February 2006 and November 2007 at the Human Reproduction Center, Department of Gynecology, Teaching Hospital of the School of Medicine, University of São Paulo, at the Huntington Center of Reproductive Medicine and at the Human Reproduction Center of Santa Joana Hospital and Maternity Home. Twenty-eight women between 20 and 39 years of age, considered high risk for the development of OHSS (presence of 20 follicles at transvaginal ultrasonography on the day prior to human chorionic gonadotrophin [hCG] administration; serum estradiol levels 3000 pg/ml prior to or on the day of hCG administration and/or a significant bilateral increase in ovarian diameter), were included. The participants were randomly allocated to one of two groups. Women in group A (n=17) took a 2.0 mg tablet of folic acid and women in group B (n=11) took a 2.5 mg tablet of bromocriptine. Both treatments were taken orally daily for 14 days beginning on the day of hCG administration. Patients were evaluated on the day of hCG administration (D1) and seven days later (D2) at which time the following tests were performed: abdominal ultrasonography to detect the presence of ascites; blood sampling for the assessment of hemoglobin, hematocrit, leukocytes, platelets, urea, creatinine, SGOT, SGPT and vascular endothelial growth factor (VEGF). In addition, a 24-hour urine sample was collected to determine creatinine clearance and urinary sodium concentration. Results: All patients concluded the study. Fourteen had ascites at D2, 10 in group A (58.8%) and 4 (36.4%) in group B (p=0.246). Of these 14 patients, 7 fulfilled the criteria for severe OHSS, 6 in group A and 1 in group B. An increase was identified in mean VEGF values in group A (134.93 pg/ml) at D2, while a reduction was found in group B (119.11 pg/ml) (p=0.462). Conclusions: Bromocriptine did neither prevent early moderate nor severe OHSS in high risk patients submitted to in vitro fertilization; however, a reduction occurred in the intraperitoneal fluid volume and in serum VEGF levels.
5

Molekulargenetische, endokrinologische und klinische Untersuchungen bei Patientinnen mit polyzystischem Ovar Syndrom und ovariellem Überstimulationssyndrom

Müller, Susanne 20 January 2003 (has links)
Das Ziel der Arbeit war es, mittels biochemischer und molekulargenetischer Untersuchungen die Rolle des partiellen 21-Hydroxylase-Mangels in der Pathogenese des Polyzystischen Ovar Syndroms (PCOS) und des Ovariellen Überstimulationssyndroms (OHSS) zu beleuchten sowie ein charakteristisches biochemisches Profil für Patientinnen mit erhöhtem Risiko zur Ausbildung eines OHSS aufzudecken. In die Studie wurden 62 Patientinnen eingeschlossen, 23 Kontrollpersonen und 39 PCOS-Patientinnen, von denen 17 Patientinnen anamnestisch mindestens eine Episode eines OHSS aufwiesen. Umfangreiche biochemische Analysen dienten zur Bestimmung der partiellen 21-Hydroxylase-Insuffizienz, zur Untersuchung des Ursprungs des Androgenüberschusses (ACTH und LHRH-Test) und zur Charakterisierung des metabolischen Profils (Leptin, Insulin, SHBG, IGF-1). Zur Darstellung des Gentotyps führten wir die lückenlose Untersuchung des CYP21A2-Gens auf Mutationen und Polymorphismen durch. Die androgenen Steroide wiesen ein bei den PCOS-Patientinnen im Vergleich zu den Kontrollpatientinnen erhöhtes Niveau auf, ohne dass sich ein klare Unterscheidung zwischen adrenalem und ovariellem Ursprung abzeichnete. Bei den OHSS-Patientinnen dominierten die ovariellen Androgene. Die Leptinwerte waren in der PCOS-Gruppe erhöht, besonders bei den Patientinnen mit OHSS. Die Frequenz heterozygoter Punktmutationen lag in unserer PCOS-Gruppe mit 23% deutlich höher als in der Kontrollgruppe mit 8%. Es ergab sich kein signifikanter Unterschied zwischen PCOS-Patientinnen mit und ohne OHSS. Die Allelfrequenz der detektierten Polymorphismen unterschied sich nicht zwischen PCOS-Patientinnen und Kontrollen. Von insgesamt 17 Patientinnen mit biochemischen Auffälligkeiten waren 8 Trägerinnen einer heterozygoten Mutation. Im Gegensatz dazu wiesen nur 8 der 11 Patientinnen mit Punktmutation biochemische Abweichungen auf. Es ergab sich also nicht für jeden Fall eine eindeutige Genotyp-Phänotyp-Korrelation. / This study was designed to evaluate the possible role of partial 21-Hydroxylase Deficiency in the pathogenesis of the Polycystic Ovary Syndrome (PCOS) and the Ovarian Hyperstimulation Syndrome (OHSS) by means of biochemical and molecular genetic investigations, as well as to identify the biochemical profile typical of patients with an elevated risk of developing an OHSS. 62 female patients were included in the study, 23 controls and 39 PCOS patients. 17 of these had at least one anamnestic episode of OHSS. Extensive biochemical investigations were used to determine partial 21-OHase Deficiency as well as the source of the androgen excess (ACTH and LHRH tests) and to describe the metabolic profile (leptin, insulin, SHBG and IGF-1). For genotypic characterization, we screened the CYP21A2 gene for any mutation or polymorphism. Androgens were elevated in the PCOS group without a clear differentiation into adrenal or ovarian origin. Amongst patients with OHSS, the ovarian androgens were dominant. Higher leptin levels were measured in the PCOS group, especially in patients with OHSS. The frequency of heterozygous point mutations was 23% in our PCOS group, compared to 8% amongst control patients. There was no relevant difference between PCOS patients with or without an OHSS. The frequency of polymorphisms did not differ between the groups. We found relevant heterozygous point mutations in 8 of the 17 patients with biochemical deviations. In contrast to this only 8 of the 11 patients with point mutations showed biochemical derangements indicating no clear Genotype-Phenotyp-correlation.
6

Maturação in vitro de oócitos de mulheres com síndrome dos ovários policísticos: comparação entre dois meios de cultivo / Oocytes In VitroMaturation of Women with Polycystic Ovarian Syndrome: Comparison Between Two Culture Medium

Araujo, Carlos Henrique Medeiros de 13 July 2007 (has links)
Objetivo:Comparar a eficácia dos meios de cultivo HTF (Human Tubal Fluid) e TCM 199 (Tissue Culture Medium) na maturação in vitro. Métodos:Estudo experimental controlado e randomizado no qual foram avaliadas as taxas de maturação oocitária, fertilização, clivagem e produção de embriões de boa qualidade em 23 ciclos não estimulados de maturação oocitária, com 119 oócitos coletados, de 13 mulheres com Síndrome dos Ovários Policísticos. Os oócitos de cada paciente foram transferidos randomicamente para cada um dos meios de cultivo sendo que, 61 (51%) foram colocados no meio TCM 199 e 58 (49%) no meio HTF. Os dois meios de cultivo receberam suplementação hormonal. Resultados:Diferenças significativas foram encontradas entre os meios de cultivo TCM 199 e HTF em relação à taxa de maturação oocitária (82% vs. 56.9%, p = 0.005), taxa de fertilização (70% vs. 39.4%, p = 0.007) e taxade produção de embriões de boa qualidade (81.3% vs. 41.7%, p= 0.023). Conclusão:O meio de cultivo HTF embora seja utilizado para manutenção de embriões em técnicas de fertilização assistida e em procedimentos de maturação in vitrocom ciclos estimulados, não é o meio mais apropriado paramaturação de oócitos obtidos de mulheres com Síndrome dos Ovários policísticosem ciclos não estimulados. / Objective:Compare oocytes human culture in human tubal fluid (HTF) and Tissue Culture Medium (TCM 199) invitromaturation cycles. Methods:Randomized controlled trial which oocyte maturation, fertilization, cleavage rates and embryo quality in 23 in vitromaturation cycles no stimulation were evaluated, resulting in 119 oocytes retrieved from 13 patients withpolycystic ovarian syndrome. The oocytes from each patient were assigned randomly to the two culture media, 61 (51%) to the TCM 199 and 58 (49%) to the HTF using the same hormonal supplementation. Results:Significant differences were observed between TCM 199 and HTF regarding maturation rate (82% vs. 56.9%, p = 0.005), fertilization rate (70% vs. 39.4%, p = 0.007) rates and embryo quality (81.3% vs. 41.7%, p= 0.023). Conclusion:The HTF medium, although widely employed for oocyte fertilization and embryo maintenance in IVF techniques, is not an appropriated medium to maturation oocytes obtained from PCOS patients innon - stimulated cycles.
7

Maturação in vitro de oócitos de mulheres com síndrome dos ovários policísticos: comparação entre dois meios de cultivo / Oocytes In VitroMaturation of Women with Polycystic Ovarian Syndrome: Comparison Between Two Culture Medium

Carlos Henrique Medeiros de Araujo 13 July 2007 (has links)
Objetivo:Comparar a eficácia dos meios de cultivo HTF (Human Tubal Fluid) e TCM 199 (Tissue Culture Medium) na maturação in vitro. Métodos:Estudo experimental controlado e randomizado no qual foram avaliadas as taxas de maturação oocitária, fertilização, clivagem e produção de embriões de boa qualidade em 23 ciclos não estimulados de maturação oocitária, com 119 oócitos coletados, de 13 mulheres com Síndrome dos Ovários Policísticos. Os oócitos de cada paciente foram transferidos randomicamente para cada um dos meios de cultivo sendo que, 61 (51%) foram colocados no meio TCM 199 e 58 (49%) no meio HTF. Os dois meios de cultivo receberam suplementação hormonal. Resultados:Diferenças significativas foram encontradas entre os meios de cultivo TCM 199 e HTF em relação à taxa de maturação oocitária (82% vs. 56.9%, p = 0.005), taxa de fertilização (70% vs. 39.4%, p = 0.007) e taxade produção de embriões de boa qualidade (81.3% vs. 41.7%, p= 0.023). Conclusão:O meio de cultivo HTF embora seja utilizado para manutenção de embriões em técnicas de fertilização assistida e em procedimentos de maturação in vitrocom ciclos estimulados, não é o meio mais apropriado paramaturação de oócitos obtidos de mulheres com Síndrome dos Ovários policísticosem ciclos não estimulados. / Objective:Compare oocytes human culture in human tubal fluid (HTF) and Tissue Culture Medium (TCM 199) invitromaturation cycles. Methods:Randomized controlled trial which oocyte maturation, fertilization, cleavage rates and embryo quality in 23 in vitromaturation cycles no stimulation were evaluated, resulting in 119 oocytes retrieved from 13 patients withpolycystic ovarian syndrome. The oocytes from each patient were assigned randomly to the two culture media, 61 (51%) to the TCM 199 and 58 (49%) to the HTF using the same hormonal supplementation. Results:Significant differences were observed between TCM 199 and HTF regarding maturation rate (82% vs. 56.9%, p = 0.005), fertilization rate (70% vs. 39.4%, p = 0.007) rates and embryo quality (81.3% vs. 41.7%, p= 0.023). Conclusion:The HTF medium, although widely employed for oocyte fertilization and embryo maintenance in IVF techniques, is not an appropriated medium to maturation oocytes obtained from PCOS patients innon - stimulated cycles.

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