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switch over of HbF to HbA ??

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switch over of HbF to HbA ??

Post by abhizluv on Wed Nov 21, 2007 5:00 pm

when does switch over of HbF to HbA occours.....

14 wks
32 wks
34 wks
36 wks


or is it like it starts around 8mth ( ???? wks ???? ) intrauterine life n 90% HbA is seen by 6 mth after being born ???

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What makes a man a Man ...
Is it the choices he makes ...;
Its not how he begins things ...
But how he finishes them makes the Difference.......... Abhi Smile


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Re: switch over of HbF to HbA ??

Post by abhizluv on Thu Nov 22, 2007 8:17 am

please refer lipincott 3e page 33.. as this is different from the answers found in different mcq books which say either 14 weeks or 32 weeks .. n when answering please mention in weeks as 8mths can = to 32 /34 weeks Smile


but c lipincott e3 pg 33 it clearly says....HbA synthesis starts around 8mth ( ???? wks ???? ) intrauterine life n 90% HbA is seen by 6 mth after birth !! please quote ur reference dr_atif !!!!!!!


in ak jain HbA production starts around 5th month = 20 weeks ?????

_________________
I wonder....
What makes a man a Man ...
Is it the choices he makes ...;
Its not how he begins things ...
But how he finishes them makes the Difference.......... Abhi Smile


RULES : http://mpge.top-me.com/start-your-own-topic-here-f26/rules-of-mpge-t166.htm?sid=1e6a39ab54b4a898a543bdf0d6eb5269

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Re: switch over of HbF to HbA ??

Post by dr dream on Mon Dec 10, 2007 4:55 pm

hb f at 4 week of ontrauterine life
20, 40, 60, 80

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Re: switch over of HbF to HbA ??

Post by drspawar on Tue Dec 11, 2007 2:24 am

dr dream the question in DNB was- HbF at 4mnths in a child?
fetal Hb is equal to adult Hb at 2 mnths of age.i.e 50%
complete change over to adult Hb is between 6mnths to 8mnths.

so, at 4 mnths HbF should be around 20-40%.
its confusing!!! answer is 20 or 40.
i hope someone tells us with reference soon! scratch

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Re: switch over of HbF to HbA ??

Post by dr dream on Tue Dec 11, 2007 11:50 am

oh sorry yaar thanks for correction

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Re: switch over of HbF to HbA ??

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