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Infertility in Males

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...

Gene Therapy

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Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...

Cancer Therapies

Cancer Therapies

Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...

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Related Experiment Video

Updated: Feb 22, 2026

Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia

Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia

Published on: May 27, 2022

Biological therapy for non-obstructive azoospermia.

Sarah C Vij¹, Edmund Sabanegh², Ashok Agarwal³

¹a Glickman Urologic and Kidney Institute , Cleveland Clinic Foundation , Cleveland , OH , USA.

Expert Opinion on Biological Therapy

|September 21, 2017

Summary

This summary is machine-generated.

Experimental fertility restoration techniques offer hope for men with non-obstructive azoospermia (NOA). Research into stem cell transplantation and gene therapy aims to provide alternatives to donor sperm or adoption for conceiving a biological child.

Keywords:

Gene therapy non-obstructive azoospermia pluripotent stem cell spermatogonial stem cell transplantation

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Area of Science:

Reproductive Medicine
Genetics
Stem Cell Biology

Background:

Non-obstructive azoospermia (NOA) presents limited fertility options for males, often restricting them to assisted reproductive techniques, donor sperm, or adoption.
Current therapeutic avenues for NOA are scarce, necessitating the exploration of novel approaches to restore male fertility.

Purpose of the Study:

To review and discuss experimental fertility restoration techniques for men diagnosed with non-obstructive azoospermia (NOA).
To provide expert opinions and future perspectives on the potential of these emerging therapies.

Main Methods:

Discussion of spermatogonial stem cell transplantation as a fertility restoration method.
Review of the utilization of adult and embryonic stem cells for in vitro gamete development.
Exploration of gene therapy applications for treating male infertility.

Main Results:

Experimental techniques show promise but face significant technical and ethical limitations.
Success has been demonstrated in animal models, indicating potential for human application.
Further research and development of standardized protocols are crucial for clinical translation.

Conclusions:

Spermatogonial stem cell transplantation, stem cell-derived gametes, and gene therapy represent promising, albeit experimental, avenues for NOA treatment.
Overcoming existing technical and ethical hurdles is essential for the successful implementation of these techniques in humans.
Continued research, particularly in human models, is required to validate efficacy and safety for restoring male fertility.