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Related Concept Videos

Meiosis II01:57

Meiosis II

Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each containing...
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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
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Development of Immunocompetence

The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
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Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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Infertility in Males01:23

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
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An In Vivo Method to Study Mouse Blood-Testis Barrier Integrity
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Immunological sterility

W Diniz Pereira de Carvalho

    Reproduccion
    |October 1, 1980
    PubMed
    Summary

    This study explores the role of immunological factors in unexplained infertility. A novel test detects antibodies affecting sperm function, offering a new diagnostic approach for couples facing fertility challenges.

    Area of Science:

    • Immunology
    • Reproductive Medicine
    • Clinical Diagnostics

    Background:

    • The immunological process involves antibodies and antigens, crucial for bodily defense.
    • Immunological factors can contribute to infertility, particularly unexplained cases.
    • Current diagnostic methods for infertility may not fully address immunological aspects.

    Purpose of the Study:

    • To elucidate the fundamental principles of immunology relevant to reproductive health.
    • To introduce a new diagnostic test for identifying immunological infertility.
    • To evaluate the efficacy of this test in clinical practice.

    Main Methods:

    • Review of immunological principles, antibody types, and antigen-antibody interactions.
    • Description of a novel in-office test for sperm agglutination and immobilization in female serum.

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  • Analysis of 182 case studies utilizing the developed test.
  • Main Results:

    • The study details the classification and function of five antibody types.
    • The novel test demonstrated the ability to detect sperm agglutination and immobilization.
    • Results from 182 cases provide initial data on the test's performance.

    Conclusions:

    • Immunological factors play a significant role in infertility.
    • The developed test serves as a valuable initial screening tool for unexplained infertility (ESCA).
    • The test offers practical advantages for office-based fertility assessments.