Mitotic Activity and Its 24-Hour Rhythm in the Ovarian Follicles during the Estrous Cycle of a Wild Rat, Bandicota bengalensis

1985 ◽  
Vol 123 (3) ◽  
pp. 195-200 ◽  
Author(s):  
Abhiram Sahu
Keyword(s):  
Mitotic Activity ◽  
Estrous Cycle ◽  
Ovarian Follicles ◽  
Bandicota Bengalensis ◽  
Wild Rat

Histomorphic changes in the ovary during the estrous cycle of a wild rat, Bandicota bengalensis

1984 ◽  
Vol 62 (6) ◽  
pp. 1052-1058 ◽  
Author(s):  
Abhiram Sahu
Keyword(s):  
Estrous Cycle ◽  
Frequency Distribution ◽  
Ovarian Follicles ◽  
Corpora Lutea ◽  
Bandicota Bengalensis ◽  
Preovulatory Follicles ◽  
Wild Rat ◽  
Size Groups

Histomorphic changes in the ovary of Bandicota bengalensis were studied during various stages of the estrous cycle. The ovarian follicles were classified into nine size groups and their frequency distribution was determined for the different phases. In all the ovaries 70% of the follicles were nonantral and below 201 μm in diameter. During proestrus and estrus the ovary possessed the highest number of nonatretic follicles. The follicles ranging above 600 μm were absent at metestrus and diestrus. Preovulatory follicles (>700 μm) were present only during estrus, indicating ovulation during the night of the day of estrus. Excepting the 30- to 50-μm follicles, all other follicles were susceptible to atresia in the cycling rats. Maximum atresia was noticed in the 201- to 500-μm follicles. The number of atretic follicles was highest at diestrus and lowest at estrus. In the continuous diestrous rats, about 50% of the atretic follicles were in the range of 30–100 μm. Three recognizable types of corpora lutea were found in the ovary. The volume of the first and second type corpora lutea was highest at proestrus and estrus, respectively. Mean number of first and second type corpora lutea was 3.87 and 4.56, respectively, and thus about four ova ovulated per ovary during each estrous cycle in this wild rat.

scholarly journals Ovarian Follicular Dynamics during the Estrous Cycle in Jennies in Upper Egypt

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
R. I. Derar ◽  
H. A. Hussein
Keyword(s):  
Growth Rate ◽  
Estrous Cycle ◽  
Slow Rate ◽  
Ovarian Follicles ◽  
Maximum Diameter ◽  
Dominant Follicle ◽  
Upper Egypt ◽  
Follicular Wave ◽  
Preovulatory Follicles ◽  
Follicular Dynamics

The objective of the current study was to describe follicular dynamics in Egyptian Jennies throughout the estrous cycle. In this experiment, 8 estrus cycles in 8 cyclic Jennies were studied from February to June using ultrasonography. The result revealed that one follicular wave per cycle was recorded throughout the studied period. Dominant follicle (DF) was firstly detected at day in Jennies. The growth rate of DF was  mm/day. Left ovulations were nonsignificantly () more than right ovulations (55.6% versus 44.6%). The CL was firstly detected at D , developed in a rate of  mm/day, reached a maximum diameter of  mm at D , and started to regress on D with a mean regression rate of  mm d-1. Results of the present study indicated that Jennies had one follicular wave per cycle. The Day of the cycle has a significant effect on the number of different classes of the ovarian follicles, but not large ones. Ultrasonographic characteristics of the preovulatory follicles could be useful to predict ovulation. CL developed and regressed in a slow rate.

scholarly journals Gossypol Promotes Degeneration of Ovarian Follicles in Rats

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Ivana Cristina Nunes Gadelha ◽  
Michelly Fernandes de Macedo ◽  
Sílvia Catarina Salgado Oloris ◽  
Marilia Martins Melo ◽  
Benito Soto-Blanco
Keyword(s):  
Estrous Cycle ◽  
Wistar Rats ◽  
Serum Levels ◽  
Ovarian Follicles ◽  
The Other ◽  
Control Group ◽  
Stages Of Development ◽  
Hormone Levels ◽  
Stage Of Development ◽  
Female Wistar Rats

The present study aimed to determine if gossypol interferes with ovarian follicles in rats. Twenty-four female Wistar rats were assigned to two equal groups: one control group and the other dosed with gossypol (25 mg/kg/day, subcutaneously) for 15 days. Ovarian follicles were histologically classified according to the stage of development and as normal or atretic. Gossypol treatment reduced the length of estrous with an increase in the duration of the diestrus phase. This compound was responsible for reduced serum levels of T4 and progesterone. Treatment with gossypol was responsible for a significant reduction in the number of normal ovarian follicles and a significant increase in the number of atretic follicles, both in all stages of development. Thus, treatment of rats with gossypol was responsible for reduction in the number of viable follicles and changes in hormone levels that resulted in interference of the estrous cycle.

Effect of ghrelin on steroid secretion in porcine ovarian follicles during the estrous cycle

2013 ◽  
Vol 13 ◽  
pp. 26
Author(s):  
Agnieszka Rak-Mardyła ◽  
Monika Dubiel ◽  
Anna Wróbel ◽  
Ewa Ł. Gregoraszczuk
Keyword(s):  
Estrous Cycle ◽  
Ovarian Follicles ◽  
Steroid Secretion

scholarly journals Growth and replacement of the ovarian follicles during the estrous cycle in philippine water buffaloes

2021 ◽  
Vol 32 (2) ◽  
pp. 308-314
Author(s):  
O. F. Smith
Keyword(s):  
Estrous Cycle ◽  
Cycle Length ◽  
Follicular Development ◽  
Ovarian Follicles ◽  
Water Buffaloes ◽  
The Mean

Six normally cycling Philippine buffaloes were selected from a herd after showing normal estrous cycle length. Follicular development was monitored using a simple fiberscope. This procedure allowed the chance to follow the pattern of growth and the population of the surface follicles at specified days (3,6,9,12,15,18 and 21) of the estrous cycle. The following endpoints were used for each ovary: diameter of surface follicles and population of the various sized follicles. The follicles were classified into small-sized follicles (1-3mm), medium-sized follicles (4-7mm) and large sized follicles (>8mm). The results of the growth and replacement of follicles showed that the mean number of small - sized follicles (1-3mm) was greater (P<.01) on days 3,9,12,15,18 and 21. The medium-sized follicles (4-7mm) were greater in number on days 12,15,18 and 21 while the large sized follicles (8mm) were observed to be different (P<.01) on days 15,18 and 21. 

Sign in / Sign up

Export Citation Format

Share Document