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Related Concept Videos

Spermatogenesis01:41

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 reproductive...
Spermatogenesis01:22

Spermatogenesis

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...
X-Inactivation01:58

X-Inactivation

The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
Sperm Transport01:15

Sperm Transport

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...
Fertilization01:38

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
The Y Chromosome Determines Maleness02:19

The Y Chromosome Determines Maleness

The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...

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Related Experiment Video

Updated: May 15, 2026

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
05:44

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

Spermatogenic function in cats.

T Tsutsui1, H Oba, S Fujimoto

  • 1International Institute of Small Animal Medicine, Bio Plus, AHB Inc, Tokyo, Japan. tsutsui-t@bioplus.jp

Reproduction in Domestic Animals = Zuchthygiene
|January 3, 2013
PubMed
Summary
This summary is machine-generated.

Feline sperm production data is scarce. Studies show that tomcats need at least six days to replenish epididymal spermatozoa after frequent collections, producing an average of 30 million sperm daily.

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Step-specific Sorting of Mouse Spermatids by Flow Cytometry
06:31

Step-specific Sorting of Mouse Spermatids by Flow Cytometry

Published on: December 31, 2015

Related Experiment Videos

Last Updated: May 15, 2026

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
05:44

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

Step-specific Sorting of Mouse Spermatids by Flow Cytometry
06:31

Step-specific Sorting of Mouse Spermatids by Flow Cytometry

Published on: December 31, 2015

Area of Science:

  • Veterinary Science
  • Reproductive Biology
  • Animal Reproduction

Background:

  • Limited data exists on feline sperm production.
  • Understanding feline reproductive capacity is crucial for breeding programs and conservation efforts.

Purpose of the Study:

  • To determine the daily sperm production rate in tomcats.
  • To establish the recovery time for epididymal spermatozoa following frequent semen collection.

Main Methods:

  • Five tomcats were subjected to frequent semen collection using the artificial vagina method to exhaust epididymal spermatozoa.
  • The time required for epididymal spermatozoa counts to return to pre-exhaustion levels was measured.
  • Daily sperm production was calculated based on recovery time and total sperm count.

Main Results:

  • A minimum of six days was required for epididymal spermatozoa counts to recover to pre-exhaustion levels after frequent collection.
  • The mean daily sperm production in tomcats was estimated to be 30 × 10^6 spermatozoa.

Conclusions:

  • Frequent semen collection can deplete epididymal spermatozoa in tomcats.
  • Tomcats require a resting period of six days or more to restore sperm count, with an average daily production of 30 million spermatozoa.