• testes
  • Medical Xpress)-A team of researchers with members from Tokyo Medical University and Aichi Medical University, both in Japan, has tested the feasibility of removing testes from one rat and surgically implanting them into the neck of another rat to preserve spermatogenesis for the first rat. (medicalxpress.com)
  • These data suggest that exposure to BPA during fetal life has profound effects on spermatogenesis in the testes when the offspring become adult. (nii.ac.jp)
  • The location [Testes/Scrotum] is specifically important as the process of spermatogenesis requires a lower temperature to produce viable sperm, specifically 1°-8 °C lower than normal body temperature of 37 °C (98.6 °F). Clinically, small fluctuations in temperature such as from an athletic support strap, causes no impairment in sperm viability or count. (wikipedia.org)
  • The release of FSH into the testes will enhance spermatogenesis and lead to the development of sertoli cells, which act as nursing cells where spermatids will go to mature after Meiosis II. (wikipedia.org)
  • LH promotes leydig cell secretion of testosterone into the testes and blood, which induce spermatogenesis and aid the formation of secondary sex characteristics. (wikipedia.org)
  • stepwise
  • The cell is also responsible for establishing and maintaining the spermatogonial stem cell niche, which ensures the renewal of stem cells and the differentiation of spermatogonia into mature germ cells that progress stepwise through the long process of spermatogenesis, ending in the release of spermatozoa in a process known as spermiation. (wikipedia.org)
  • severely
  • In mei2.5 / mei2.5 animals, repro12/mei2.5 heterozygotes, and repro12/Akap9 − heterozygotes (F-H, respectively), spermatogenesis is severely impaired and the lumen is devoid of mature spermatozoa (open arrows). (nih.gov)
  • mice
  • Bisphenol A (BPA), which has previously been shown to have estrogenic activity, was examined for its effect on spermatogenesis in offspring of mice that had been exposed to BPA during gestation. (nii.ac.jp)
  • processes
  • The basic processes of spermatogenesis are astonishingly similar in even very different animals, and the genes responsible are highly conserved ( Bonilla & Xu 2008 ). (royalsocietypublishing.org)
  • In addition to carrying out the meiosis-specific chromosome processes of pairing and recombination, the chromosomes in male germline cells activate transcription of a diverse set of spermatogenesis-specific genes. (royalsocietypublishing.org)
  • However, during the 1990s and 2000s researchers have focused around increasing understanding of the regulation of spermatogenesis via genes, proteins, and signaling pathways, and the biochemical and molecular mechanisms involved in these processes. (wikipedia.org)
  • abnormal
  • In humans, chromosomal abnormalities arising from incorrect spermatogenesis results in congenital defects and abnormal birth defects (Down Syndrome, Klinefelter's Syndrome) and in most cases, spontaneous abortion of the developing foetus. (wikipedia.org)
  • development
  • Year-round presence in the Charlotte Harbor estuarine system, Florida made R. bonasus a good model for beginning to understand ontogenetic gonad development and spermatogenesis in chondrichthyans, especially viviparous rays. (springer.com)
  • results
  • Histological and immunohistochemical results demonstrate that in the lizard Podarcis sicula during the mating period, Clomiphene as well as FSH determines the breakdown of spermatogenesis and the epididymal regression, presumably through estrogens input as indirectly demonstrated by the appearance of ER α and vitellogenin in the liver. (hindawi.com)
  • Study
  • Interestingly, the fact that TAF7l localizes in a different compartment relative to TBP during early spermatogenesis implies a TBP-independent function that awaits further study. (wikipedia.org)
  • another
  • Each type Ad spermatogonium divides to produce another type Ad spermatogonium, which can further carry on spermatogenesis, and one type Ap spermatogonium, which differentiates further. (wikipedia.org)