Results 251 to 260 of about 30,611 (293)
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Hormonal Dynamics During Luteal-Follicular Transition*
The Journal of Clinical Endocrinology & Metabolism, 1987To gain insights into the neuroendocrine basis for the initiation of folliculogenesis, the hormonal dynamics during the period from the late luteal to the early follicular phase of the menstrual cycle (the luteal-follicular transition) were examined.
MAIS, VALERIO +5 more
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Follicular Dynamics and Apoptosis Following Unilateral Oophorectomy
Systems Biology in Reproductive Medicine, 2010Ovarian physiology has been based on the assumption that the mammalian ovary has a constant germ cell pool. According to this accepted doctrine primordial follicles, which are limited in number, are depleted through ovulation or atresia. Therefore, the primary goal of this study was to examine the follicle dynamics and morphologic apoptotic changes ...
Ulukus, Cagnur +3 more
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Follicular dynamics prior to and during superovulation in heifers
Theriogenology, 1993The present ultrasonographic study examined the relationship between certain follicular parameters and the superovulatory response in gonadotropin-stimulated heifers. Thirty heifers received a total of 35 mg FSH twice daily for 4 d and 0.75 mg cloprostenol were given to induce luteolysis and estrus at 72 h after the initial FSH injection.
Purwantara, Bambang +3 more
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Follicular dynamics during the ovulatory season in goats
Theriogenology, 1994Growth and regression of ovarian follicles>or=3 mm were studied by transrectal ultrasonography for 4 interovulatory intervals in each of 5 Saanen goats. The observed number of growing identified 4-mm follicles per day differed (Por=6 mm followed a pattern of significant peaks on Days 0 (ovulation), 4,8 and 14.
O J, Ginther, K, Kot
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Follicular dynamics in sheep and cattle
Theriogenology, 1991Abstract In sheep and cattle, recruitment (i.e. entrance in the acutely gonadotrophin dependent stage), selection (i.e. adjustment of the number of recruited follicles to the number of ovulations) followed by dominance occur at regular intervals whatever the reproductive stage (prepuberal, luteal phase, anoestrus).
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Factors that affect ovarian follicular dynamics in cattle
Journal of Animal Science, 1992Studies of ovarian follicular dynamics in cattle may lead to methods for improving fertility, for synchronizing estrus with more precision, and for enhancing superovulatory responses. Within an estrous cycle, two or three large (> 10 mm) follicles develop during consecutive waves of follicular growth.
M C, Lucy +4 more
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Follicular growth and ovarian dynamics in mammals.
Journal of reproduction and fertility. Supplement, 1997General characteristics of female reproductive activity, such as seasonality, cyclicity and triggering of ovulation differ widely among mammals, but common mechanisms underlie ovarian function. In all mammals, follicles begin to grow from a pool of primordial follicles constituted early in life, continuously throughout the life of the female ...
Monniaux, Danielle +7 more
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Follicular Dynamics, Ovulation and Conception Rates in Bitches
Reproduction in Domestic Animals, 2009ContentsReal‐time ultrasound imaging was used in a clinical study to estimate the number of follicles of different sizes, ovulation and conception rates, and to study follicle dynamics following oestrus‐induction of bitches.Follicles were identified during late anoestrus (between 100 and 60 days prior to the pre‐ovulatory LH surge) and there appeared ...
England GC, RUSSO, MARCO, Freeman SL
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Progress in understanding ovarian follicular dynamics in cattle
Theriogenology, 2008The study of follicular dynamics began in the mid-20th century, but progress has been particularly rapid in the last two decades through the use of tools that have enabled serial, non-invasive examination. A brief overview of early oogenesis and folliculogenesis is provided as a backdrop to the evolution of our understanding of follicular dynamics ...
G P, Adams +3 more
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Ovarian follicular dynamics in Caspian mares
Journal of Equine Veterinary Science, 2002Abstract The characteristics of the major follicular waves (primary and secondary) throughout estrous cycle were studied in 7 healthy Caspian mares (age, 4-15 years; weight, 198.6 ± 0.9 kg) during the breeding season. Ovarian follicular dynamics were monitored by using an ultrasound scanner equipped with a 5-MHz, B-mode, linear-array, rectal ...
A. Shirazi +3 more
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