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Related Concept Videos

Sperm Structure and Semen Composition01:22

Sperm Structure and Semen Composition

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During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
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Spermatogenesis01:41

Spermatogenesis

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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...
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Spermatogenesis01:22

Spermatogenesis

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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
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Sperm Transport01:15

Sperm Transport

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The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
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Infertility in Males01:23

Infertility in Males

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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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Testes: Histology01:27

Testes: Histology

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A tough, fibrous membrane, the tunica albuginea, covers the testes, extending inward to form fibrous partitions or septa, dividing them into internal compartments called lobules. Each lobule has 1 to 3 tightly coiled seminiferous tubules where sperm production occurs. These tubules merge into a tubular network at the back of the testis, known as the rete testis. It connects to 15 to 20 efferent ductules, leading to the epididymis.
The spermatogenic cells, responsible for producing sperm, are...
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Related Experiment Video

Updated: Apr 20, 2026

Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
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Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects

Published on: April 21, 2022

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Sperm functional tests.

Sergio Oehninger1, Daniel R Franken2, Willem Ombelet3

  • 1Department of Obstetrics and Gynaecology, Jones Institute for Reproductive Medicine, Eastern Virginia Medical School, Norfolk, Virginia.

Fertility and Sterility
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

Sperm function tests offer valuable insights beyond routine semen analysis, predicting IVF success and guiding infertility treatment decisions. These assays can help avoid ineffective treatments and direct patients to appropriate interventions like intracytoplasmic sperm injection.

Keywords:
Acrosome reactionmale infertilitysperm functional testsperm penetration assaysperm–zona pellucida binding tests

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Area of Science:

  • Reproductive Medicine
  • Andrology
  • Infertility Diagnostics

Background:

  • Routine semen analysis (sperm concentration, motility, morphology) is standard for male fertility assessment.
  • Sperm functional tests are often considered research tools, not routinely used in infertility clinics.
  • Existing methods lack comprehensive predictive power for male infertility outcomes.

Purpose of the Study:

  • To review the clinical value and applications of four key sperm function tests.
  • To evaluate the predictive accuracy of sperm functional assays for in vitro fertilization (IVF) outcomes.
  • To explore the potential of these tests in guiding clinical decision-making for male infertility.

Main Methods:

  • Review of four sperm function tests: sperm penetration assay, sperm-zona pellucida binding, acrosome reaction, and hyaluronan binding assay.
  • Analysis of the current value, indications, interpretation, and therapeutic implications of each test.
  • Correlation of sperm functional assay results with IVF outcomes.

Main Results:

  • Sperm functional assays demonstrate high predictive value for IVF success.
  • These tests can assist in differentiating fertile from subfertile males more effectively than routine analysis alone.
  • Functional assays show potential to optimize treatment pathways, reducing unnecessary intrauterine insemination (IUI) and facilitating timely intracytoplasmic sperm injection (ICSI).

Conclusions:

  • Sperm functional tests are powerful tools for male infertility diagnosis and treatment planning.
  • They can improve patient management by guiding decisions between IUI and ICSI.
  • Future advancements in molecular biology may lead to simpler, more accessible sperm function assays.