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1st polar body

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1st polar body

Post by sana on Sat Nov 24, 2007 4:08 pm

when is the 1st polar body released?
a)at the time of ovulation?
b_24 hrs before ovulation???

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re: 1 st polar body :)

Post by abhizluv on Tue Nov 27, 2007 2:11 am

Code:
D C Dutta 5th editiion 2001 page 20 / new edition has the same page i guess !
USMLE step 1 notes from KAPLAN  ANATOMY page 96


changes in the oocyte ...
Significant changes in the oocyte occour just prior to ovulation (few hours )..
this means to say its upto 6hours prior .. not 24hours !!
completion of the arrested 1st meiotic division occours with extrusion of 1st polar body and a secondary oocyte is formed..
the secondary oocyte becomes arrested in metaphase of meiosis II and is ovulated .

At fertilization within the ampullary part of uterine tube , the secondary oocyte completes meiosis II to form a mature oocyte and 2nd polar body !

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