Book contents
- Frontmatter
- Contents
- Contributors
- Foreword
- Preface
- Introduction
- PART I PHYSIOLOGY OF REPRODUCTION
- PART II INFERTILITY EVALUATION AND TREATMENT
- PART III ASSISTED REPRODUCTION
- 38 Medical Strategies to Improve ART Outcome: Current Evidence
- 39 Surgical Preparation of the Patient for In Vitro Fertilization
- 40 IVF in the Medically Complicated Patient
- 41 Polycystic Ovary Syndrome and IVF
- 42 Endometriosis and Assisted Reproductive Technology
- 43 Evidence-Based Medicine Comparing hMG/FSH and Agonist/Antagonist and rec/Urinary hCG/LH/GnRH to Trigger Ovulation
- 44 Luteal Phase Support in Assisted Reproduction
- 45 Thrombophilia and Implanation Failure
- 46 Intrauterine Insemination
- 47 The Prediction and Management of Poor Responders in ART
- 48 Oocyte Donation
- 49 In Vitro Maturation of Human Oocytes
- 50 Oocyte and Embryo Freezing
- 51 Cryopreservation of Male Gametes
- 52 The Management of Azoospermia
- 53 Spermatid Injection: Current Status
- 54 Optimizing Embryo Transfer
- 55 Single Embryo Transfer
- 56 Blastocyst Transfer
- 57 Clinical Significance of Embryo Multinucleation
- 58 Quality and Risk Management in the IVF Laboratory
- 59 The Nurse and REI
- 60 Understanding Factors That Influence the Assessment of Outcomes in Assisted Reproductive Technologies
- 61 The Revolution of Assisted Reproductive Technologies: How Traditional Chinese Medicine Impacted Reproductive Outcomes in the Treatment of Infertile Couples
- 62 Complications of Assisted Reproductive Technology
- 63 Ectopic and Heterotopic Pregnancies Following in Vitro Fertilization
- 64 The Impact of Oxidative Stress on Female Reproduction and ART: An Evidence-Based Review
- 65 PGD for Chromosomal Anomalies
- 66 Preimplantation Genetic Diagnosis for Single-Gene Disorders
- 67 Epigenetics and ART
- 68 Congenital Anomalies and Assisted Reproductive Technology
- PART IV ETHICAL DILEMMAS IN FERTILITY AND ASSISTED REPRODUCTION
- Index
- Plate section
- References
64 - The Impact of Oxidative Stress on Female Reproduction and ART: An Evidence-Based Review
from PART III - ASSISTED REPRODUCTION
Published online by Cambridge University Press: 04 August 2010
- Frontmatter
- Contents
- Contributors
- Foreword
- Preface
- Introduction
- PART I PHYSIOLOGY OF REPRODUCTION
- PART II INFERTILITY EVALUATION AND TREATMENT
- PART III ASSISTED REPRODUCTION
- 38 Medical Strategies to Improve ART Outcome: Current Evidence
- 39 Surgical Preparation of the Patient for In Vitro Fertilization
- 40 IVF in the Medically Complicated Patient
- 41 Polycystic Ovary Syndrome and IVF
- 42 Endometriosis and Assisted Reproductive Technology
- 43 Evidence-Based Medicine Comparing hMG/FSH and Agonist/Antagonist and rec/Urinary hCG/LH/GnRH to Trigger Ovulation
- 44 Luteal Phase Support in Assisted Reproduction
- 45 Thrombophilia and Implanation Failure
- 46 Intrauterine Insemination
- 47 The Prediction and Management of Poor Responders in ART
- 48 Oocyte Donation
- 49 In Vitro Maturation of Human Oocytes
- 50 Oocyte and Embryo Freezing
- 51 Cryopreservation of Male Gametes
- 52 The Management of Azoospermia
- 53 Spermatid Injection: Current Status
- 54 Optimizing Embryo Transfer
- 55 Single Embryo Transfer
- 56 Blastocyst Transfer
- 57 Clinical Significance of Embryo Multinucleation
- 58 Quality and Risk Management in the IVF Laboratory
- 59 The Nurse and REI
- 60 Understanding Factors That Influence the Assessment of Outcomes in Assisted Reproductive Technologies
- 61 The Revolution of Assisted Reproductive Technologies: How Traditional Chinese Medicine Impacted Reproductive Outcomes in the Treatment of Infertile Couples
- 62 Complications of Assisted Reproductive Technology
- 63 Ectopic and Heterotopic Pregnancies Following in Vitro Fertilization
- 64 The Impact of Oxidative Stress on Female Reproduction and ART: An Evidence-Based Review
- 65 PGD for Chromosomal Anomalies
- 66 Preimplantation Genetic Diagnosis for Single-Gene Disorders
- 67 Epigenetics and ART
- 68 Congenital Anomalies and Assisted Reproductive Technology
- PART IV ETHICAL DILEMMAS IN FERTILITY AND ASSISTED REPRODUCTION
- Index
- Plate section
- References
Summary
INTRODUCTION
Aerobic metabolism is associated with the generation of pro-oxidant molecules called free radicals or reactive oxygen species (ROS) that include the hydroxyl radicals, superoxide anion, hydrogen peroxide, and nitric oxide. There is a complex interaction of the pro-oxidants and antioxidants, resulting in the maintenance of the intracellular homeostasis. Whenever there is an imbalance between the pro-oxidants and antioxidants, a state of oxidative stress (OS) is initiated.
OVERVIEW OF OS AND ROS
Under normal conditions, paired electrons create stable bonds in biomolecules. However, if the bond is weak, it might break, leading to the formation of free radicals. Free radicals are defined as any species with one or more unpaired electrons in the outer orbit that include ROS such as superoxide, hydrogen peroxide, hydroxyl, and singlet oxygen radicals. They are generally very small molecules and are highly reactive due to the presence of unpaired valence shell electrons, initiating a cascade of reactions of more free radicals leading to uncontrolled chain reactions (1). Free radicals such as the superoxide radical are formed when high-energy electrons leak from the electron transport chain. The dismutation of superoxide results in the formation of hydrogen peroxide. The hydroxyl ion is a major type of ROS that is highly reactive, having the ability to modify purine and pyrimidines and cause damaging DNA strand breaks (2,3).
ROS are formed endogenously as a natural byproduct of aerobic metabolism and through the activity of various metabolic pathways and enzymes of oocytes and embryos.
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- Information
- Infertility and Assisted Reproduction , pp. 629 - 642Publisher: Cambridge University PressPrint publication year: 2008
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