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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

Ovarian Toxicity in Breast Cancer Survivors

McArdle, Orla 22 November 2012 (has links)
The long-term natural history of ovarian reserve after adjuvant chemotherapy for breast cancer has been poorly described. We recruited 52 breast cancer survivors treated with adjuvant chemotherapy before 40 years of age who remained premenopausal after chemotherapy treatment. Twenty (38.5%) were more than five years out from treatment. Ovarian reserve estimates were compared with a control group. Anti-Müllerian hormone (AMH), follicle stimulating hormone and luteinizing hormone demonstrated significant differences consistent with reduced ovarian reserve in breast cancer survivors. Mean AMH was 6.65 pmol/l in survivors compared to 17.43 in controls (p < 0.001). Attained age and age at the time of treatment were correlated with AMH levels in breast cancer survivors. Conclusion: Ovarian reserve is significantly reduced in young breast cancer survivors. Age is the major predictor of AMH level in survivors. A 35 year old breast cancer survivor has an AMH level similar to a 45 year old control.
2

Ovarian Toxicity in Breast Cancer Survivors

McArdle, Orla 22 November 2012 (has links)
The long-term natural history of ovarian reserve after adjuvant chemotherapy for breast cancer has been poorly described. We recruited 52 breast cancer survivors treated with adjuvant chemotherapy before 40 years of age who remained premenopausal after chemotherapy treatment. Twenty (38.5%) were more than five years out from treatment. Ovarian reserve estimates were compared with a control group. Anti-Müllerian hormone (AMH), follicle stimulating hormone and luteinizing hormone demonstrated significant differences consistent with reduced ovarian reserve in breast cancer survivors. Mean AMH was 6.65 pmol/l in survivors compared to 17.43 in controls (p < 0.001). Attained age and age at the time of treatment were correlated with AMH levels in breast cancer survivors. Conclusion: Ovarian reserve is significantly reduced in young breast cancer survivors. Age is the major predictor of AMH level in survivors. A 35 year old breast cancer survivor has an AMH level similar to a 45 year old control.
3

Fórmula combinando idade, contagem de folículos antrais, hormônio antimulleriano e hormônio folículo estimulante é mais acurada em predizer má resposta à estimulação ovariana controlada do que os marcadores isoladamente em pacientes de bom prognóstico / A formula combining age, antral follicle count, antimullerian hormone, and follicle stimulating hormone is more accurate than individual markers in predicting poor response to controlled ovarian stimulation in good prognosis patients

Palhares Junior, Maurilio Batista 23 September 2015 (has links)
Apesar da acumulada experiência e tecnologia da reprodução assistida, ainda é comum a ocorrência de má resposta (MR) à estimulação ovariana (EOC). Alguns dos mecanismos que prejudicam a resposta ovariana são conhecidos, como a obesidade e a redução de reserva funcional ovariana com o avançar da idade. No entanto, também se observa má resposta à estimulação ovariana controlada em pacientes jovens e sem comprometimento dessa reserva ovariana. Apesar do desenvolvimento de marcadores para predizer a má resposta, como o hormônio folículo estimulante (FSH), o hormônio antimulleriano (AMH) ou a contagem de folículos antrais (CFA), ainda não há disponibilidade de mecanismos amplamente confiáveis para este fim. Há controvérsias quanto a qual destes preditores apresenta maior acurácia. Esta incerteza é ainda maior quando se analisa a população infértil de aparente bom prognóstico, ou seja, jovens, não obesas e com boa reserva ovariana. Predizer a má resposta neste grupo permitiria importante incremento na qualidade do tratamento destas pacientes. O objetivo deste estudo foi avaliar a acurácia dos marcadores de resposta ovariana como idade, FSH, AMH e CFA e comparar a acurácia destes entre si e combinados em uma fórmula para predizer má resposta à estimulação ovariana controlada em pacientes de bom prognóstico. Foram avaliadas 141 mulheres com idade <40 anos, FSH <10 mUI/ml e índice de massa corpórea (IMC) <30 Kg/m2,, consecutivamente submetidas à injeção intracitoplasmática de espermatozoides (ICSI), a partir de espermatozoides obtidos através de ejaculado. Destas, 45 (32%) obtiveram <3 oócitos e, portanto, tiveram má resposta ovariana. Avaliou-se a acurácia dos marcadores citados em predizer a má resposta através da área sob a curva ROC (AUC). A fórmula obteve AUC = 0.82, valor significativamente superior aos marcadores isolados (idade=0.67, CFA=0.74, AMH=0.75 e FSH=0,61). Também foram definidos os valores de corte para se obter a taxa de detecção de 50% e 80% e analisadas as taxas de verossimilhança dos marcadores. Concluiu-se que a fórmula é mais acurada em predizer má resposta ovariana à EOC do que qualquer dos marcadores isoladamente. / Age, antral follicle count (AFC), antimullerian hormone (AMH) and follicle stimulating hormone (FSH) are frequently used for the prediction of the ovarian response to controlled ovarian stimulation (COS). The objective of this study is to assess the accuracy of a formula combining all these parameters in predicting poor ovarian response (POR) to COS in good prognosis women. We included all good prognosis women submitted to COS for intracitoplasmatic sperm injection (ICSI) between n Feb-2008 and Jan-2009 who accepted to participate. We defined good prognosis as: age <40 years, basal FSH <10 mIU/ml, and body mass index (BMI) <30 Kg/m2; in which the ICSI was performed with sperm obtained by ejaculation. POR was defined as 3 oocytes retrieved or cycle cancelation before oocyte retrieval due to a poor ovarian response. We performed a linear regression to determine a formula to predict POR using age and the logarithm regression of AFC, AMH and FSH. We assessed the predictive accuracy by the area under ROC curve (AUC). Additionally, we determined the cut-off values and false positive rate (FPR) for predicting POR with a detection rate of 50% and 80%. We evaluated 141 women who were submitted to COS and oocyte retrieval; 45 (32%) had POR. The formula to predict poor ovarian response was 0.024 + 0.017*Age - 0.403*LogAFC - 0.339*LogAMH + 0.204*LogFSH. The AUC observed for the formula (0.82) was significantly higher than for the isolated markers (age = 0.67, AFC = 0.74, AMH = 0.75, FSH = 0.61). We also determined the cut-off values and false positive rates for obtaining detection rates of 50% and 80%. We conclude that the formula combining age, FSH, AMH, and AFC is more accurate in predicting POR than individual markers.
4

Fórmula combinando idade, contagem de folículos antrais, hormônio antimulleriano e hormônio folículo estimulante é mais acurada em predizer má resposta à estimulação ovariana controlada do que os marcadores isoladamente em pacientes de bom prognóstico / A formula combining age, antral follicle count, antimullerian hormone, and follicle stimulating hormone is more accurate than individual markers in predicting poor response to controlled ovarian stimulation in good prognosis patients

Maurilio Batista Palhares Junior 23 September 2015 (has links)
Apesar da acumulada experiência e tecnologia da reprodução assistida, ainda é comum a ocorrência de má resposta (MR) à estimulação ovariana (EOC). Alguns dos mecanismos que prejudicam a resposta ovariana são conhecidos, como a obesidade e a redução de reserva funcional ovariana com o avançar da idade. No entanto, também se observa má resposta à estimulação ovariana controlada em pacientes jovens e sem comprometimento dessa reserva ovariana. Apesar do desenvolvimento de marcadores para predizer a má resposta, como o hormônio folículo estimulante (FSH), o hormônio antimulleriano (AMH) ou a contagem de folículos antrais (CFA), ainda não há disponibilidade de mecanismos amplamente confiáveis para este fim. Há controvérsias quanto a qual destes preditores apresenta maior acurácia. Esta incerteza é ainda maior quando se analisa a população infértil de aparente bom prognóstico, ou seja, jovens, não obesas e com boa reserva ovariana. Predizer a má resposta neste grupo permitiria importante incremento na qualidade do tratamento destas pacientes. O objetivo deste estudo foi avaliar a acurácia dos marcadores de resposta ovariana como idade, FSH, AMH e CFA e comparar a acurácia destes entre si e combinados em uma fórmula para predizer má resposta à estimulação ovariana controlada em pacientes de bom prognóstico. Foram avaliadas 141 mulheres com idade <40 anos, FSH <10 mUI/ml e índice de massa corpórea (IMC) <30 Kg/m2,, consecutivamente submetidas à injeção intracitoplasmática de espermatozoides (ICSI), a partir de espermatozoides obtidos através de ejaculado. Destas, 45 (32%) obtiveram <3 oócitos e, portanto, tiveram má resposta ovariana. Avaliou-se a acurácia dos marcadores citados em predizer a má resposta através da área sob a curva ROC (AUC). A fórmula obteve AUC = 0.82, valor significativamente superior aos marcadores isolados (idade=0.67, CFA=0.74, AMH=0.75 e FSH=0,61). Também foram definidos os valores de corte para se obter a taxa de detecção de 50% e 80% e analisadas as taxas de verossimilhança dos marcadores. Concluiu-se que a fórmula é mais acurada em predizer má resposta ovariana à EOC do que qualquer dos marcadores isoladamente. / Age, antral follicle count (AFC), antimullerian hormone (AMH) and follicle stimulating hormone (FSH) are frequently used for the prediction of the ovarian response to controlled ovarian stimulation (COS). The objective of this study is to assess the accuracy of a formula combining all these parameters in predicting poor ovarian response (POR) to COS in good prognosis women. We included all good prognosis women submitted to COS for intracitoplasmatic sperm injection (ICSI) between n Feb-2008 and Jan-2009 who accepted to participate. We defined good prognosis as: age <40 years, basal FSH <10 mIU/ml, and body mass index (BMI) <30 Kg/m2; in which the ICSI was performed with sperm obtained by ejaculation. POR was defined as 3 oocytes retrieved or cycle cancelation before oocyte retrieval due to a poor ovarian response. We performed a linear regression to determine a formula to predict POR using age and the logarithm regression of AFC, AMH and FSH. We assessed the predictive accuracy by the area under ROC curve (AUC). Additionally, we determined the cut-off values and false positive rate (FPR) for predicting POR with a detection rate of 50% and 80%. We evaluated 141 women who were submitted to COS and oocyte retrieval; 45 (32%) had POR. The formula to predict poor ovarian response was 0.024 + 0.017*Age - 0.403*LogAFC - 0.339*LogAMH + 0.204*LogFSH. The AUC observed for the formula (0.82) was significantly higher than for the isolated markers (age = 0.67, AFC = 0.74, AMH = 0.75, FSH = 0.61). We also determined the cut-off values and false positive rates for obtaining detection rates of 50% and 80%. We conclude that the formula combining age, FSH, AMH, and AFC is more accurate in predicting POR than individual markers.

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