Dictionary » P » Primary oocyte

Primary oocyte

Definition

noun, plural: primary oocytes

The oocyte that arises from the oogonium via the process of oocytogenesis, and gives rise to secondary oocyte and polar body after first meiotic division (meiosis I).


Supplement

In humans, the primary oocytes are produced by the process of oocytogenesis that occurs during embryonic stage. At that time each oogonium inside the ovaries of the fetus divides and enters the initial stage of meiosis I to become the primary oocyte.

The primary oocyte however will not complete meiosis I but rather stopped at prophase I of meiosis I. It will only complete meiosis at the time of ovulation (that is at the time the child reaches the puberty stage). By that time, the primary oocyte undergoes first meiotic division giving rise to one secondary ooctye and one polar body.


See also: secondary oocyte


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Human Pathology 'Multiple-Choice Questions'

... FSH levels. 8. Which of the following induces meiotic progress of a primary oocyte to a secondary oocyte? a. The estradiol surge during the second half of the follicular ...

See entire post
by ScrimmSphere
Mon Feb 04, 2013 11:03 am
 
Forum: Human Biology
Topic: Human Pathology 'Multiple-Choice Questions'
Replies: 1
Views: 3360

What phase is responsible for me looking like my father?

... Also if you could help me on this, How many ovules are produced by each primary oocyte? Its not 2. I apreciate the help, i have to write a paper but i dont understand any ...

See entire post
by blackrat
Mon Mar 05, 2012 5:45 pm
 
Forum: Genetics
Topic: What phase is responsible for me looking like my father?
Replies: 3
Views: 1713

Sporophyte, spermatogenesis and oogenesis?

... phase? spermatogonial stem cells- still 46 chromatid and 46 chromosomes primary spermatocyte- s phase has occured so 46 chromosome and 92 chromatid? ... s phase has not occured?- 46 chromosomes and 46 chromatid primary oocyte- s phase has occured so 46 chromatid and 92 chromatid? ootid and the ...

See entire post
by jacobamark99
Fri May 27, 2011 5:38 pm
 
Forum: Genetics
Topic: Sporophyte, spermatogenesis and oogenesis?
Replies: 0
Views: 3186

RBC

... proteins made before the maturation) what i meant in the case of the oocyte was, that during division the transcribtion is halted and since the primary oocyte stops at the middle of it (diplotene stage) proteine production shoud be stopped ...

See entire post
by fluktuacia
Mon May 14, 2007 6:50 am
 
Forum: Cell Biology
Topic: RBC
Replies: 17
Views: 6435

RBC

I can't think of a reason why a primary oocyte won't be able to undergo transciption...

See entire post
by Revenged
Fri May 11, 2007 11:23 pm
 
Forum: Cell Biology
Topic: RBC
Replies: 17
Views: 6435
View all matching forum results

This page was last modified 11:47, 7 October 2009. This page has been accessed 17,459 times. 
What links here | Related changes | Permanent link