Different gender conjoined twins?

Discussion in 'Current Events' started by tpjunkie, Oct 12, 2003.

  1. macrumors 65816

    tpjunkie

    Joined:
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    NYC
    #1
    CNN article: http://www.cnn.com/2003/WORLD/europe/10/12/italy.twins.ap/index.html

    ROME, Italy (AP) -- Four-month-old twins, a boy and a girl, from Greece who were joined at the temple were successfully separated during surgery at a Rome hospital, a hospital official said.

    Now correct me if I'm wrong here, but conjoined twins result from incomplete cytokinesis in the newly fertilized zygote, a process that if completed leads to identical twins if the two cells separate from each other, right? Therefore, all conjoined twins are identical twins, and must be the same sex.

    How is it possible that a boy and a girl end up as conjoined twins? Some kind of fusing of fetuses is almost certainly impossible as well, because something only one in 8 million or so fraternal twins share a placenta, and thus amniotic sac. i.e., its extremely rare.
     
  2. macrumors 68020

    idkew

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    #2
    Re: Different gender conjoined twins?

    i think you answered it yourself. rare, but possible.

    althought the CNN article i just skimmed used boys in the plural... so it might have been a mistake in your article.
     
  3. macrumors P6

    wdlove

    Joined:
    Oct 20, 2002
    #3
    I found a very informative site about conjoined twins. It gives the Etymology, How are they formed?, Types of conjoined twins, Rare from, & Ethics of separation. I pray that the conjoined twins from Iran currently at Childrens Hospital in LA will be succesfull. They are craniopagus, meaing joined at the head. Occurs in 2% of conjoined twins. They are boys connected at the crown of the head. Boys are more rare than girls. I just pray that the real possibility of brain damage will not occur. The problem is the interconnection of blood vessels, blood supply is crucial to brian cells.

    http://www.conjoined-twins.i-p.com/
     
  4. macrumors 603

    rainman::|:|

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    #4
    gender is a good deal less black and white than you realize. one possibility here, tho not the only one, is that one or both of the children are intersexed... partially or fully...

    would be pretty rare tho, considering the low number of both conjoined twins and intersexed people...

    pnw
     
  5. macrumors 65816

    ColoJohnBoy

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    #5
    Bear ub nubd U haven't been in Biology for some time, but if I remember correctly, there is a situation where two separete sperm can fertilize a single egg. This is incredibly rare, even more so than conjoined twins or hermaphroditism, but it would be possible for the two to coincide.
     
  6. thread starter macrumors 65816

    tpjunkie

    Joined:
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    #6
    Two sperm can indeed fertilize a single egg, but the resulting zygote will not get beyond the blastula stage of development.

    I think the article probably just made a mistake
     
  7. macrumors 65816

    idea_hamster

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    #7
    [OT]

    Is that like ubby-dubby language from Zoom? And did I just date myself?:D

    (Figured it out for "Bear in mind", but still....)

    [/OT]
     
  8. macrumors regular

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    Boston
    #8
    Re: [OT]

    You did date yourself... and me too... I used to watch that show when I was a kid:rolleyes:
     
  9. macrumors P6

    wdlove

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    #9
  10. Administrator

    Doctor Q

    Staff Member

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    #10
    News from today At UCLA Medical Center:

    Doctors Hope to Aid Dominican Baby with Rare Defect
    Girl With 2nd Head to Undergo Surgery (partway down page)
    Rebeca was born in mid-December in Santo Domingo. She is otherwise healthy but her brain cannot develop normally unless the undeveloped head is removed.
     
  11. macrumors newbie

    Joined:
    Mar 28, 2008
    #11
    You see conjoined twins like this can occur due to radiation. Its call fusion. Were the twins fuse together after formation. Of there cellular structure.
     
  12. macrumors G5

    CanadaRAM

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    #12
    Great thread resurrection there -- 4 year old forum threads can be revived from the dead with massive doses of radiation or spelling errors. :D
     
  13. macrumors 603

    notjustjay

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    Canada, eh?
    #13
    Is it just me or has this been happening a lot lately? I swear this is the third one I read today.
     
  14. macrumors 68030

    Joined:
    Nov 7, 2004
    #14
    That's because modern threads ain't as good as they used to be. Some people prefer classics.
     
  15. macrumors 68040

    Killyp

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    #15
    No, it's because people don't check the date of a thread before they reply to it.
     
  16. macrumors 68020

    question fear

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    #16
    Yes, but who searches for conjoined twin threads on macrumors?
     
  17. macrumors 68030

    iMpathetic

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    #17
    Probably just poking around on someone's profile.
     
  18. macrumors 6502a

    d_and_n5000

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    Oct 6, 2005
    #18
    Heh. I do that all the time on these other forums I visit because at the bottom of each thread they have a "similar thread" function. So I click on one, don't pay any attention to the date(it sorts by relevancy and has nothing to do with date), get interested, post a reply, and realize I've answered the question from a member banned four years previously. :eek:
     

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