HISTOGENESIS, DEVELOPMENT AND ATRESIA OF OVARIAN FOLLICLES IN DIFFERENT DEVELOPMENTAL STAGES OF 
MAKUII EWE FETUSES

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HASANZADEH S.; ASGHARI AZAR J.

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF VETERINARY RESEARCH (IJVR) Year:2005 | Volume:6 | Issue:2 (12) Page(s): 42-50

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Title

HISTOGENESIS, DEVELOPMENT AND ATRESIA OF OVARIAN FOLLICLES IN DIFFERENT DEVELOPMENTAL STAGES OF MAKUII EWE FETUSES

Author(s)

HASANZADEH S. | ASGHARI AZAR J. | Issue Writer Certificate

Keywords

MAKUII EWE

FETUS

FOLLICULAR DEVELOPMENT

FOLLICULAR ATRESIA

Abstract

This study was conducted to determine the histogenesis, growth and atresia of ovarian follicles in Makuii sheep FETUSes at different developmental stages. Forty FETUSes in four ages group of <35, 36–70, 71–100 and 101–150 intrauterine days old were taken for study. The FETUSes were collected and preserved in 10% neutral buffered formalin solution. After recognition and harvesting of ovaries from FETUSes, they were processed through routine paraffin embedding. Serial 5–7 µm thick sections were taken and stained with Hematoxylin-Eosin, Verhoeff, Van Gieson, Toluidne blue and PAS. Histologic and histomorphometric (point count) studies were adopted. In FETUSes < 35 days old, the necrotic primordial germ cells (PGCs) were identified by pyknotic, condensed or karyolytic nuclei. In these FETUSes, the undifferentiated gonads were recognized at the caudal aspects of the developing metanephrous kidneys. The healthy PGCs, were large with euchromatic nuclei, without any somatic cell surrounding them. In 36–70 days old FETUSes, the germ cells were observed in clusters, which surrounded by simple squamous cells. The hilus cells were seen in mesovarium. In the 71–100 days old FETUSes, primordial follicles were observed. In the 84 days old FETUSes, primary follicles were seen for the first time. In the ovaries of 101–150 days old FETUSes, the secondary follicles with zona pellucida and theca folliculi were seen. Tertiary follicles were not seen in any age groups. The mean number of germ cell population at 0.25 mm2 surface area of ovary, was the highest in 36–70 days old and lowest in 101–150 days old age group FETUSes. It was revealed that in all age groups, the population of healthy follicles and/or germ cells is higher than population of atretic follicles and that there was significant difference (P<0.001) between them. There were significant (P<0.001) differences in the mean distribution of healthy follicles and or germ cells among all age groups. There were significant (P< 0.001) differences in atretic follicles among all age groups, except between 36–70 days old and 71–100 days old FETUSes. We concluded that by increasing age, a decrease in population of healthy as well as atretic follicles in FETUSes takes place. However, in all age groups, the population of the healthy follicle is greater than the population of atretic follicles.

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APA: Copy

HASANZADEH, S., & ASGHARI AZAR, J.. (2005). HISTOGENESIS, DEVELOPMENT AND ATRESIA OF OVARIAN FOLLICLES IN DIFFERENT DEVELOPMENTAL STAGES OF MAKUII EWE FETUSES . IRANIAN JOURNAL OF VETERINARY RESEARCH (IJVR), 6(2 (12)), 42-50. SID. https://sid.ir/paper/531508/en

Vancouver: Copy

HASANZADEH S., ASGHARI AZAR J.. HISTOGENESIS, DEVELOPMENT AND ATRESIA OF OVARIAN FOLLICLES IN DIFFERENT DEVELOPMENTAL STAGES OF MAKUII EWE FETUSES . IRANIAN JOURNAL OF VETERINARY RESEARCH (IJVR)[Internet]. 2005;6(2 (12)):42-50. Available from: https://sid.ir/paper/531508/en

IEEE: Copy

S. HASANZADEH, and J. ASGHARI AZAR, “HISTOGENESIS, DEVELOPMENT AND ATRESIA OF OVARIAN FOLLICLES IN DIFFERENT DEVELOPMENTAL STAGES OF MAKUII EWE FETUSES ,” IRANIAN JOURNAL OF VETERINARY RESEARCH (IJVR), vol. 6, no. 2 (12), pp. 42–50, 2005, [Online]. Available: https://sid.ir/paper/531508/en

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