Results 251 to 260 of about 3,016,950 (290)

Hormonal Dynamics During Luteal-Follicular Transition*

The Journal of Clinical Endocrinology & Metabolism, 1987
To 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, Cetel N. S, Muse K. N, Quigley M. E, Reid R. L, Yen S. S.   +5 more
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Factors that affect ovarian follicular dynamics in cattle

Journal of Animal Science, 1992
Studies 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, J D, Savio, L, Badinga, R L, De La Sota, W W, Thatcher   +4 more
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Follicular dynamics prior to and during superovulation in heifers

Theriogenology, 1993
The 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, Schmidt, Mette, Greve, Torben, Callesen, Henrik; id_orcid 0000-0002-0185-7300   +3 more
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Follicular dynamics in sheep and cattle

Theriogenology, 1991
Abstract 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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Follicular Dynamics, Ovulation and Conception Rates in Bitches

Reproduction in Domestic Animals, 2009
ContentsReal‐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, 2008
The 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, R, Jaiswal, J, Singh, P, Malhi   +3 more
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Follicular growth and ovarian dynamics in mammals.

Journal of reproduction and fertility. Supplement, 1997
General 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, Huet, Camille, Besnard, N., Clement, F., Bosc, Melanie, Pisselet, C., Monget, Philippe, Mariana, J.C.   +7 more
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Follicular dynamics and superovulatory response in heifers

Animal Reproduction Science, 1996
The study examined whether the response of heifers to exogenous gonadotrophin superovulatory treatment could be predicted from a knowledge of previous antral follicular dynamics. During a pretreatment monitoring phase, of 24 normal oestrous cycles (20.1 ± 0.33 days long) observed in 17 heifers, one, 15 and seven cycles showed one, two and three antral ...
Singh, SP, Broadbent, PJ, Hutchinson, JSM, Watt, RG, Dolman, DF   +4 more
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Ovarian follicular dynamics in Caspian mares

Journal of Equine Veterinary Science, 2002
Abstract 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, F. Gharagozloo, A. Niasari-Naslaji, M. Bolourchi   +3 more
openaire   +1 more source

Ovarian follicular dynamics in water buffalo

Theriogenology, 1996
Abstract The pattern of growth and regression of ovarian follicles was characterized during 7 complete estrous cycles in 5 water buffalo by daily ultrasonographic examinations of the ovaries. Follicles ≥ 4 mm were measured and their relative locations within the ovary were determined to follow the sequential development of each individual follicle ...
M. Taneja, A. Ali, G. Singh
openaire   +1 more source