Someone should research and write the information concerning the temperature at which spermatogenesis will actually occur. They should also comment on how the scrotum helps to regulate this temperature as needed to halt or start spermatogenesis. This information would also be useful for those of use that get really saggy balls after sex and have trouble sleeping because of it. You know then every one would know that a cold pack on the taint will tighten those suckers back up. I am completely serious about this because I was just perusing wikipedia for the same information after this exact situation. MCP 05:24, 29 December 2005 (UTC)
We were always taught in anatomy that the testicles hang lower to show sexual maturity, with it having nothing to do with optimum temperature. Can someone find a referance for this? — Preceding unsigned comment added by 194.82.50.2 ( talk) 16:37, 3 May 2012 (UTC)
According to "endocrinology, an integrated approach" : Sperm can be stored up to 5 weeks in the tail of the epididymis and vas deferens before they are released at ejaculation. In the absence of ejaculation sperm dribble into the urethra and are washed away in the urine. In men who have undergone a vasectomy (ligation of the vas deferens) sperm build up behind the ligation and are either removed by phagocytosis in the epididymis or leak through the epididymal wall. 5/06/06
The medieval theory of spermatogenesis was quite different from this. They believed that the sperm was actually male's "purest form" of blood, and that when ejaculation occured in the vagina, this sperm mixed with the cooler female blood, which created some sort of "bond" between the two. It was one of the reasons to forbid premarital sex, because the partners would then be linked somehow and a further marriage would be incestious. I don't know a lot about the subject, but i do remember reading it one book, i'll try to find that source. Should this be included in this article, since it is so different, or to another page? -- MateoP 16:38, 2 February 2006 (UTC)
Another Question: I have heard things like "50 drops of blood being used for the creation of one drop of Semen"!! Seriously. Can someone tell me whether there is any role of blood in Spermatogenesis? Why is that we feel pale and exhausted after sex?? I have been doing a serious peruse of wikipedia for this!!
I've come across the above terms in the context of male infertility (including the Pedia articles on it) but can't find decent definitions anywhere. Could someone please put some in if possible? Thanks! -- Tyranny Sue ( talk) 01:18, 15 February 2010 (UTC)
Some idea would be nice. 10/day/gonad? Billion/day/gonad? -- Michael C. Price talk 23:09, 17 February 2010 (UTC)
Ok, I dont mean to be too picky, but im pretty sure the chromosmal orientation in primary spermatocytes and secondary spermatocytes is incorrect as discussed in this topic. This is how I understand it, and I have some literature that also infers what I am saying.
Spermatogonia (2N)
(Mitosis)
Primary Spermatocytes (4N)
(Meiosis 1)
Secondary Spermatocytes (2N)
(Meiosis 2)
Spermatid & beyond (N)
This may look crazy at first but it makes way more sense. How can you go through meiosis 2 without halving the chromosome count?? This always perplexed me until i looked into it furhter and found literature on the subject. Here it is:
1)Kimura, Y. (1995). Development of Normal Mice from Oocytes Injected with Secondary Spermatocyte Nuclei (in: BIOLOGY OF REPRODUCTION 53, 855-862)
2)Ogura, A. (1998). Development of Normal Mice from Metaphase I Oocytes Fertilized with Primary Spermatocytes (in: Proceedings of the National Academy of Sciences, Vol. 95, No. 10 pp. 5611-5615)(first paragraph of abstract)
3)Mays-Hoopes, L.L. (1995). Preparation of Spermatogonia, Spermatocytes, and Round Spermatids for Analysis
of Gene Expression Using Fluorescence-Activated Cell Sorting. (in: BIOLOGY OF REPRODUCTION 53, 1003-1011)
4)This website lays it out pretty clear
http://www.expertreviews.org/01002320h.htm
Hope someone can address this...I think the spermatocyte page needs an update too Jimboapu ( talk) 03:58, 25 April 2008 (UTC)
Actually, "N" refers to ploidy and "C" to DNA copy number, so spermatocytes are NEVER tetraploid (any more than any mitotically dividing cell is tetraploid). The correct nomenclature to use for a mitotically dividing cell is 2N:2C (Go), 2N:4C (DNA repl), 2N:2C (G1-G2 etc). For meiosis it is as follows. 2N:2C (Go), 2N:4C (DNA repl prior to MI ), 1N:2C (after MI), 1N:1C (after MII). All gametes are haploid after MI because both post-recombinationally modified chromatids of the replicated chromosomes segregate to the daughter cells, making them numerically haploid (1N). They still have two DNA copies though (2C) at this stage.
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What the hell! Sub-section
spermatocytogenesis is to be merged with Spermatocytogenesis. While the link to main article exists. And both articles are no the same! So why {{
merge}}
is used?
117.222.90.195 (
talk)
12:37, 17 June 2015 (UTC)
The comment(s) below were originally left at Talk:Spermatogenesis/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
rated top as high school/SAT biology content -
tameeria
15:11, 17 February 2007 (UTC)
changed rating from top to high for consistency with similar MCB pages - tameeria 15:02, 18 February 2007 (UTC) I'm no expert on this, so if the B rating seems wrong, please adjust. - tameeria 21:02, 18 February 2007 (UTC) |
Last edited at 21:02, 18 February 2007 (UTC). Substituted at 06:41, 30 April 2016 (UTC)
Explain the stages of spermatagensis 41.191.104.124 ( talk) 15:24, 16 April 2022 (UTC)
Someone should research and write the information concerning the temperature at which spermatogenesis will actually occur. They should also comment on how the scrotum helps to regulate this temperature as needed to halt or start spermatogenesis. This information would also be useful for those of use that get really saggy balls after sex and have trouble sleeping because of it. You know then every one would know that a cold pack on the taint will tighten those suckers back up. I am completely serious about this because I was just perusing wikipedia for the same information after this exact situation. MCP 05:24, 29 December 2005 (UTC)
We were always taught in anatomy that the testicles hang lower to show sexual maturity, with it having nothing to do with optimum temperature. Can someone find a referance for this? — Preceding unsigned comment added by 194.82.50.2 ( talk) 16:37, 3 May 2012 (UTC)
According to "endocrinology, an integrated approach" : Sperm can be stored up to 5 weeks in the tail of the epididymis and vas deferens before they are released at ejaculation. In the absence of ejaculation sperm dribble into the urethra and are washed away in the urine. In men who have undergone a vasectomy (ligation of the vas deferens) sperm build up behind the ligation and are either removed by phagocytosis in the epididymis or leak through the epididymal wall. 5/06/06
The medieval theory of spermatogenesis was quite different from this. They believed that the sperm was actually male's "purest form" of blood, and that when ejaculation occured in the vagina, this sperm mixed with the cooler female blood, which created some sort of "bond" between the two. It was one of the reasons to forbid premarital sex, because the partners would then be linked somehow and a further marriage would be incestious. I don't know a lot about the subject, but i do remember reading it one book, i'll try to find that source. Should this be included in this article, since it is so different, or to another page? -- MateoP 16:38, 2 February 2006 (UTC)
Another Question: I have heard things like "50 drops of blood being used for the creation of one drop of Semen"!! Seriously. Can someone tell me whether there is any role of blood in Spermatogenesis? Why is that we feel pale and exhausted after sex?? I have been doing a serious peruse of wikipedia for this!!
I've come across the above terms in the context of male infertility (including the Pedia articles on it) but can't find decent definitions anywhere. Could someone please put some in if possible? Thanks! -- Tyranny Sue ( talk) 01:18, 15 February 2010 (UTC)
Some idea would be nice. 10/day/gonad? Billion/day/gonad? -- Michael C. Price talk 23:09, 17 February 2010 (UTC)
Ok, I dont mean to be too picky, but im pretty sure the chromosmal orientation in primary spermatocytes and secondary spermatocytes is incorrect as discussed in this topic. This is how I understand it, and I have some literature that also infers what I am saying.
Spermatogonia (2N)
(Mitosis)
Primary Spermatocytes (4N)
(Meiosis 1)
Secondary Spermatocytes (2N)
(Meiosis 2)
Spermatid & beyond (N)
This may look crazy at first but it makes way more sense. How can you go through meiosis 2 without halving the chromosome count?? This always perplexed me until i looked into it furhter and found literature on the subject. Here it is:
1)Kimura, Y. (1995). Development of Normal Mice from Oocytes Injected with Secondary Spermatocyte Nuclei (in: BIOLOGY OF REPRODUCTION 53, 855-862)
2)Ogura, A. (1998). Development of Normal Mice from Metaphase I Oocytes Fertilized with Primary Spermatocytes (in: Proceedings of the National Academy of Sciences, Vol. 95, No. 10 pp. 5611-5615)(first paragraph of abstract)
3)Mays-Hoopes, L.L. (1995). Preparation of Spermatogonia, Spermatocytes, and Round Spermatids for Analysis
of Gene Expression Using Fluorescence-Activated Cell Sorting. (in: BIOLOGY OF REPRODUCTION 53, 1003-1011)
4)This website lays it out pretty clear
http://www.expertreviews.org/01002320h.htm
Hope someone can address this...I think the spermatocyte page needs an update too Jimboapu ( talk) 03:58, 25 April 2008 (UTC)
Actually, "N" refers to ploidy and "C" to DNA copy number, so spermatocytes are NEVER tetraploid (any more than any mitotically dividing cell is tetraploid). The correct nomenclature to use for a mitotically dividing cell is 2N:2C (Go), 2N:4C (DNA repl), 2N:2C (G1-G2 etc). For meiosis it is as follows. 2N:2C (Go), 2N:4C (DNA repl prior to MI ), 1N:2C (after MI), 1N:1C (after MII). All gametes are haploid after MI because both post-recombinationally modified chromatids of the replicated chromosomes segregate to the daughter cells, making them numerically haploid (1N). They still have two DNA copies though (2C) at this stage.
![]() | This ![]() It is of interest to the following WikiProjects: | |||||||||||||
|
![]() | This help request has been answered. If you need more help, you can , contact the responding user(s) directly on their user talk page, or consider visiting the Teahouse. |
What the hell! Sub-section
spermatocytogenesis is to be merged with Spermatocytogenesis. While the link to main article exists. And both articles are no the same! So why {{
merge}}
is used?
117.222.90.195 (
talk)
12:37, 17 June 2015 (UTC)
The comment(s) below were originally left at Talk:Spermatogenesis/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
rated top as high school/SAT biology content -
tameeria
15:11, 17 February 2007 (UTC)
changed rating from top to high for consistency with similar MCB pages - tameeria 15:02, 18 February 2007 (UTC) I'm no expert on this, so if the B rating seems wrong, please adjust. - tameeria 21:02, 18 February 2007 (UTC) |
Last edited at 21:02, 18 February 2007 (UTC). Substituted at 06:41, 30 April 2016 (UTC)
Explain the stages of spermatagensis 41.191.104.124 ( talk) 15:24, 16 April 2022 (UTC)