Search Results - Nina Ayvazova

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  1. 1
    Glutathione Content and Glutathione Peroxidase Activity of Sperm in Males with Unexplained Infertility

    Glutathione Content and Glutathione Peroxidase Activity of Sperm in Males with Unexplained Infertility by Danail Martinov, Nina Ayvazova, Emiliana Konova, Milena Atanasova

    Published 2021-06-01

    The study aimed to investigate glutathione peroxidase (GPx) activity and glutathione (GSH) levels in the sperm of patients with unexplained infertility. The sperm samples were collected from subjects with normal semen parameters divided into fertile and infertile groups. Sperm analysis was performed...

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  2. 2
    Levels of MMP2, TIMP1 and TIMP2 in Follicular Fluids in Women Undergoing in Vitro Fertilization and Their Relationship to Oocyte Quality

    Levels of MMP2, TIMP1 and TIMP2 in Follicular Fluids in Women Undergoing in Vitro Fertilization and Their Relationship to Oocyte Quality by Nina Ayvazova, Lyubomira Ilieva, Emiliana Konova, Milena Atanasova

    Published 2019-12-01

    Recently, the important role of matrix metalloproteinases (MMPs) has been identified in follicular development and subsequent ovulation. Although the role of MMP in ovarian tissue remodeling during folliculogenesis has been well studied, the relationship between matrix protease activity and their in...

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  3. 3
    Assessment of the Impact of Oxidative Stress on Frozen Seminal Plasma in Fertile and Infertile Men by Examining the Total Antioxidant Capacity

    Assessment of the Impact of Oxidative Stress on Frozen Seminal Plasma in Fertile and Infertile Men by Examining the Total Antioxidant Capacity by Violeta Rilcheva, Nina Ayvazova, Danail Martinov, Cvetomir Ivanov, Emiliana Konova

    Published 2014-11-01

    The aim of the study was to explore the impact of oxidative stress on frozen seminal plasma in fertile and infertile men by examining the total antioxidant capacity. Patients: Infertile patients from male infertility clinic with various diagnoses and fertile men. Design: Seminal plasma from proven f...

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  4. 4
    Matrix Metalloproteinase Mmp-2 and Mmp-9 Activities in Seminal Plasma

    Matrix Metalloproteinase Mmp-2 and Mmp-9 Activities in Seminal Plasma by Nina Ayvazova, Violeta Rilcheva, Emiliana Konova, Roumen Roussev, Pavel Rashev

    Published 2016-12-01

    Matrix metalloproteinases (MMPs) areagroup of proteases containing Zn ions asacofactor, which are involved in degrading ofalarge number of extracellular matrix proteins, and bioactive molecules. They also playamajor role in processes such as cell proliferation, cell migration, differentiation and ap...

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  5. 5
    Sperm DNA Integrity Test and Assisted Reproductive Technology (Art) Outcome

    Sperm DNA Integrity Test and Assisted Reproductive Technology (Art) Outcome by Violeta Rilcheva, Nina Ayvazova, Lyubomira Ilieva, Svetlana Ivanova, Emiliana Konova

    Published 2016-09-01

    The objective of the study was to investigate the influence of sperm DNA fragmentation index (DFI) by DNA integrity test on pregnancy outcome and pregnancy loss after assisted reproductive technology (ART) procedure: autologous intracytoplasmic sperm injection (ICSI), donation eggs ICSI, and intraut...

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