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Understanding the early ovarian developmental changes in the female chickens
Ping Yu,Jian Li,Yuling Mi #,Caiqiao Zhang *
College of Animal Sciences, Zhejiang University
*Correspondence author
#Submitted by
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Funding: Ph.D. Programs Foundation of Ministry of Education of China （No.No.20110101110099）
Opened online:11 December 2015
Accepted by: none
Citation: Ping Yu,Jian Li,Yuling Mi.Understanding the early ovarian developmental changes in the female chickens[OL]. [11 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4669011
 
 
The reproductive performance of female hen mainly depends on ovarian and follicular development. Therefore the complete insight of the mechanisms leading to the development of ovary is very important. In this respect we have studied early ovarian development until the formation of primordial follicles in the chicken. Our study was based on on the early ovarian development and then post hatching development of ovary. We have noticed asymmetric ovarian developmental phenomenon after E7.5 of embryonic chicken sex differentiation. The size of the right side ovary was not distinct and cortex disappeared. The right ovarian germ cell proliferation rate gradually decreased from E5.5 to E7.5 and some of them were crowded into the medullary lacunae by programmed cell death. In our another study we have noticed that the primordial follicle formation started to commence after the third day after hatching and it became rapid after first week of post hatching to two weeks of post hatching in the female chicken. In addition to this, we have observed an abnormal phenomenon during the formation of primordial follicle when a low number of the multiple oocyte follicles that were thought to be oocyte cysts and did not completely break apart during cyst breakdown due to the unknown reason. This underlying mechanisms needs further research. Therefore, our study of early ovarian development in the chicken will make a theoretical base for further understanding of the regulation of reproduction function and improving the laying performance in poultry.
Keywords:chicken; the right side ovary; germ cell; primordial follicle;
 
 
 

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