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Spermatogenesis

Spermatogenesis

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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Related Experiment Video

Updated: Dec 13, 2025

Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization

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Non-directed postmortem sperm donation: some questions.

Frederick Kroon¹, Ben Kroon²

¹Philosophy, The University of Auckland, Auckland, New Zealand f.kroon@auckland.ac.nz.

Journal of Medical Ethics

|August 6, 2020

Summary

This summary is machine-generated.

Non-directed postmortem sperm donation could increase donor sperm availability. However, current methods lack reliability for conception, raising ethical concerns and limiting policy implementation.

Keywords:

artificial insemination and surrogacy

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Area of Science:

Reproductive Medicine
Bioethics
Sperm Donation

Background:

Voluntary non-directed postmortem sperm donation (VNDPSD) has been proposed to increase donor sperm quantity and diversity.
This concept allows men to register for sperm donation after death for use by unrelated recipients.

Purpose of the Study:

To evaluate the ethical and practical feasibility of VNDPSD.
To address concerns regarding the reliability of postmortem sperm for conception.

Main Methods:

Critical analysis of existing methodologies for retrieving and assessing postmortem sperm viability.
Review of ethical considerations surrounding posthumous reproductive materials.

Main Results:

Current techniques for retrieving postmortem sperm do not reliably ensure a high chance of conception.
The unreliability of postmortem sperm significantly impacts its potential use by recipients.

Conclusions:

The technical limitations in ensuring sperm viability postmortem raise significant ethical questions.
These practical challenges make the widespread implementation of VNDPSD policies unlikely in the near future.