spermatogenesis

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Related to spermatogenesis: Sertoli cells, oogenesis, gametogenesis

spermatogenesis

[sper″mah-to-jen´ĕ-sis]

the development of mature spermatozoa from spermatogonia; it includes spermatocytogenesis and spermiogenesis.

sper·ma·to·gen·e·sis

(sper'mă-tō-jen'ĕ-sis),

The entire process by which spermatogonial stem cells divide and differentiate into sperms. The process has three phases: spermatocytogenesis, meiosis, and spermiogenesis.
See also: spermiogenesis, meiosis, spermatocytogenesis.

Synonym(s): spermatogeny

[spermato- + G. genesis, origin]

spermatogenesis

(spər-măt′ə-jĕn′ĭ-sĭs, spûr′mə-tə-)

Formation and development of spermatozoa by meiosis and spermiogenesis.

sper·mat′o·ge·net′ic (-jə-nĕt′ĭk), sper·mat′o·gen′ic (-jĕn′ĭk) adj.

spermatogenesis

The process of sperm production, which occurs in the testes.

spermatogenesis

Physiology The production of male sex gametes; the maturational changes that transform spermatids into spermatozoa. See Sperm.

sper·ma·to·gen·e·sis

(spĕr'mă-tō-jen'ĕ-sis)

The entire process by which spermatogonial stem cells divide and differentiate into spermatozoa.
See also: spermiogenesis
Synonym(s): spermatocytogenesis.

[spermato- + G. genesis, origin]

SPERMATOGENESIS

spermatogenesis

(sper?mat-o-jen'e-sis) [? + genesis, generation, birth]

The formation of mature functional spermatozoa. In the process, undifferentiated spermatogonia become primary spermatocytes, each of which divides to form two secondary spermatocytes. Each of these divides to form two spermatids, which transform into functional motile spermatozoa. In the process, the chromosome number is reduced from the diploid to the haploid number.

See: illustration; gametogenesis; maturation; meiosisillustration

spermatogenesis

the form ofMEIOSIS producing male gametes. see GAMETOGENESIS.

Spermatogenesis

The process by which sperm develop to become mature sperm, capable of fertilizing an ovum.

Mentioned in: Infertility

References in periodicals archive ?

In what may be a hint for what's to come, AYTU announced in August that the Natesto[R] Spermatogenesis Study results have been accepted for presentation as a "Late-Breaking Abstract" by the American Society for Reproductive Medicine (ASRM).

Aytu BioScience $10.00 Price Target Reiterated By Northland Securities Ahead Of Spermatogenesis Study Data Release (NasdaqCM: AYTU)

Probably the toxic effects of varicocele over time reach a plateau where the restoration potential of spermatogenesis is completely eliminated.

Effect of Varicocelectomy on Restoration of Spermatogenesis in Patients with Non-obstructive Azoospermia/Non-obstruktif Azoospermik Erkeklerde Varikoselektominin Spermatogenez Restorasyonuna Etkisi

Angiotensin II dependent testicular fibrosis and effects on spermatogenesis after vasectomy in the rat.

Improved Histoarchitectural Changes with Angiotensin Receptor Blockers in Early Testicular and Cauda Toxicity in Rats/Mejora de los Cambios en la Histoarquitectura con Bloqueadores de Receptores de Angiotensina en la Toxicidad Precoz Testicular y de Cauda en Ratas

"The finding of focal spermatogenesis in a third of patients would support a microsurgical approach to sperm retrieval at the time of orchidectomy to maximize success."

Spermatogenesis Still Occurs in Men With Testicular Cancer; Spermatogenesis often occurs away from tumor; findings may aid fertility planning, sperm retrieval

Spermatogonial transplantation and reconstitution of donor cell spermatogenesis in recipient mice.

Isolation and Proliferation of Spermatogonial Cells from Ghezel Sheep

Zn has been shown to be vital for spermatogenesis. It plays a significant role in testis development and sperm physiologic functions (6).

Zinc is an Essential Element for Male Fertility: A Review of Zn Roles in Men's Health, Germination, Sperm Quality, and Fertilization

Meanwhile, miR-449a, miR-34c-5p and miR-122 could be used as biomarkers of germ cell maturation (Abu-Halima et al., 2014; Munoz et al., 2015), and miR-449a/b/c were essential for normal spermatogenesis and male fertility (Yuan et al., 2015).

The Predicted Target Genes of miR-122/449a Validation and Effects on Sertoli Cells Proliferation

For exploration of genes expression induced by DNA methylation and further insight into the molecular mechanisms underlying the influence of hemicastration on spermatogenesis, we performed RNA-seq on two testicular samples from each group (hemicastrated and control) and generated approximately 5 giga bases (Gb) of filtered data for each sample.

Hemicastration induced spermatogenesis-related DNA methylation and gene expression changes in mice testis

Improvements in re-establishing spermatogenesis after chemotherapy have also not been recorded [36].

FERTILITY PRESERVATION IN CANCER PATIENTS/OCUVANJE FERTILITETA KOD ONKOLOSKIH PACIJENATA

In contrast to primates, for example, marmosets, two or more cellular associations (stages of seminiferous epithelium) were identified from a cross section of the seminiferous tubule [18], because spermatogenesis as in marmoset is asymmetrically distributed, resulting in more than one stage per cross section of seminiferous tubule [20].

Characterization of Seminiferous Epithelium Stages in the Wild Javan Muntjac (Muntiacus muntjak muntjak) Using the Tubular Morphology Method

Phenotype information (including abnormal male infertility and abnormal spermatogenesis) based on mouse models were obtained from the Mouse Genome Informatics (MGI) database [18].

Bioinformatics Analysis of Transcriptomic Data Reveals Refined Functional Networks for the Self-Renewal of Mouse Spermatogonial Stem Cells

Moreover, leptin modulates the nutritional support of spermatogenesis by human Sertoli cells [15].