RNA synthesis in the oocyte and granulosa cell nuclei of growing follicles has been studied in the mouse ovary. The RNA precursor [(3)H]uridine was administered intraperitoneally to adult mice and the amount of label incorporated into ovarian RNA was quantitated autoradiographically using grain-counting procedures. Uridine incorporation into the nucleus is low in oocytes of small, resting folli...

OBJECTIVE The purpose of this experimental rat model study is to evaluate the changes in the ovarian environment after excision of the rudimentary horn. METHODS Ten female Wistar albino rats were used in this study. One cm of right uterine horn length was excised in the first operation. Two months after the first operation, all animals were sacrificed to obtain ovaries for histological examin...

Effect of co-culture of buffalo preantral follicles with different somatic cells, i.e. cumulus cells, granulosa cells, Ovarian Mesenchymal Cells (OMC) and Oviductal Epithelial Cells (OEC) was studied. Large preantral follicles were isolated by microdissecting the trypsin (1%) digested ovarian cortical slices. Cumulus cells were isolated by repeated pipetting of oocytes, granulosa cells were iso...

background: maturity of silver carp (hypophthalmichthys molitrix) ovary takes place at 2-8 years old and it is depends on photoperiod and environmental water temperature. objectives: the aim of this study was to identify  macroscopical and microscopical structure of silver carp  ovary in  two categories of  body weight, total body length and  at  2 and 4 years old  in khuzestan province climati...

The effect of superovulation by pregnant mare serum gonadotropin (PMSG) on autologous transplanted ovaries in the lumbar muscles of mice was histomorphometrically evaluated using the indices of number and volume of different kind of follicles and volume of corpora lutea, ovary, and stroma. Angiogenesis was observed after mouse ovarian transplantation on days 14 and 21 after ovarian grafting. Af...

One hundred and .tWO puberal gilts from nine genetic groups were used to determine the association of two morphological types of Ovarian follicular loss (hemorrhagic and milky) with genetic background of ~gilts, level of feed intake and stage of estrous cycle. At estrus (day 0 of estrous cycle) a lesser prqportion of gilts (P<.05) had hemorrhagic foiiicles than gilts at day-15. While the total ...

Seasonal changes in the number of polyovular follicles were estimated in a Vespertilionid bat, Scotophilus heathi. The largest number of polyovular follicles was observed during September, which coincided with the period of maximum development of intra-ovarian rete cells cord. It has been suggested that interaction between rete cells cord and follicle may be responsible for giving rise to a num...

Prepuberal gilts were injected with PMSG to determine whether expression of a bovine growth hormone (bGH) transgene inhibited preovulatory maturation of ovarian follicles. Seven transgenic (TG) gilts of line 3706, which expresses a mouse metallothionein-bGH transgene, and eight nontransgenic, control (C) gilts (128 to 147 d old) were injected with PMSG, 12.5 IU/kg BW, 72 h before necropsy. Surf...

Anti-Müllerian hormone (AMH) plays an important role in folliculogenesis. AMH null mice display an increased recruitment of primordial follicles. Nevertheless, these mice do not have proportionally more preovulatory follicles. Therefore, AMH null mice provide an interesting genetic model to study the regulation of species-specific number of preovulatory follicles. We studied the follicle pool t...

The distribution of arbitrarily-classed large (~>4 mm dia.) and small (<4 mm dia.) follicles between the ovary with the lesser number of corpora lutea and the ovary with the greater number of corpora lutea was studied in pregnant cows, sows and ewes. At mid-pregnancy in the cow, numbers of large follicles reached a low level and remained at that level to the end of pregnancy on the ovary that c...