Results 251 to 260 of about 25,757 (296)

Granulosa cell pyknosis in the dominant follicle of monkeys

Fertility and Sterility, 1982
One of the primary morphologic criteria used as the first sign of degeneration of an antral follicle is the presence of a pyknotic nucleus in granulosa cells lining the lumen. This study was undertaken to determine whether granulosa cells with a pyknotic nucleus are also present in the putative dominant follicle. Dominance was verified by elevations of
M J, Koering, A L, Goodman, R F, Williams, G D, Hodgen   +3 more
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The final stages of dominant follicle selection in cattle

Domestic Animal Endocrinology, 2002
The final stages of ovarian follicle growth in cattle are typically characterized by the ultrasound-detectable emergence of a cohort of small (3-5mm in diameter) antral follicles, followed by a selection process during which the number of follicles continuing to grow decreases.
M, Mihm, E J, Austin
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Characteristics of developing prolonged dominant follicles in cattle

Domestic Animal Endocrinology, 2003
In cattle, sub-luteal circulating progesterone induces an increase in the frequency of LH pulses, prolonged growth of the dominant follicle, increased peripheral estradiol and reduced fertility. The objective of this study was to examine the earliest stages of development of prolonged dominant follicles, to gain insight into the etiology of this ...
P J, Bridges, J E, Fortune
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The bovine dominant ovarian follicle

Journal of Animal Science, 2007
Central roles in reproductive biology (i.e., growth and development of the oocyte, steroidogenesis, and ovulation) are played by the ovarian dominant follicle (DF). The DF is different from other follicles because it can escape atresia (the fate of all other follicles), and if exposed to the LH surge, its cells will differentiate into the corpus luteum.
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Influence of the dominant follicle on oocytes from subordinate follicles

Theriogenology, 1999
As the oocyte grows within the follicle, a number of factors influence its health and developmental competence. These factors include follicle size, day of estrous cycle, level of atresia and influence of other follicles such as the dominant follicle. Follicles were dissected from ovaries of synchronized dairy cows on four days during the estrous cycle,
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Complexities of follicle deviation during selection of a dominant follicle in Bos taurus heifers

Theriogenology, 2016
Follicle deviation during a follicular wave is a continuation in growth rate of the dominant follicle (F1) and decreased growth rate of the largest subordinate follicle (F2). The reliability of using an F1 of 8.5 mm to represent the beginning of expected deviation for experimental purposes during waves 1 and 2 (n = 26 per wave) was studied daily in ...
O J, Ginther, J M, Baldrighi, M A R, Siddiqui, E R, Araujo   +3 more
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Activation of PPARG inhibits dominant follicle development in cattle

Theriogenology, 2020
The peroxisome proliferator-activated receptor gamma (PPARG, also called NR1C3) is a nuclear receptor of the peroxisome proliferator-activated receptor family (PPAR). PPARs are involved in the regulation of apoptosis, cell cycle, estradiol and progesterone synthesis, and metabolism.
Juliana G, Ferst, Monique T, Rovani, Andressa M P, Dau, Bernardo G, Gasperin, Alfredo Q, Antoniazzi, Vilceu, Bordignon, Dimas E, Oliveira, Paulo B D, Gonçalves, Rogério, Ferreira   +8 more
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Follicle Deviation in Ovulatory Follicular Waves with One or Two Dominant Follicles in Mares

Reproduction in Domestic Animals, 2009
ContentsThe follicle and hormone aspects of diameter deviation and development of one dominant (≥28 mm) follicle (1DF) vs two dominant follicles (2DF) were studied in 32 ovulatory follicular waves in mares. Follicles were ranked each day as F1 (largest) to F3.
J C, Jacob, E L, Gastal, M O, Gastal, G R, Carvalho, M A, Beg, O J, Ginther   +5 more
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Estrus synchronization and fertility after the control of formation and regression of the corpus luteum, and emergence of the ovarian dominant follicle in cattle

Theriogenology, 1996
Three expirements were conducted with the aim of improving estrus synchronization and conception rates to AJ after progestogen-based estrus synchronization.
D Jillella, J E Kinder
exaly   +2 more sources

Switching of follicle destiny so that the second largest follicle becomes dominant in monovulatory species

Theriogenology, 2021
During an ovulatory follicular wave in the monovulatory species of heifers, mares, and women, the two largest follicles deviate in diameter at the end of a common follicle growth phase. The largest follicle before deviation becomes the future ovulatory follicle in most ovulatory waves.
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