Browsing by Subject "Major physiology of reproduction"
Now showing items 1-20 of 39
-
(Texas A&M University. Libraries, 1967)Forty Santa Gertrudis cows ranging in age from 3 to 13 years of age were used in this study. Those animals considered to have normal records had a calving interval of 467 days or less and had been "open" for 150 days or ...
-
(Texas A&M University. Libraries, 1978)A Leydig cell stimulation assay for luteinizing hormone was applied to the analysis of LH activity in serum samples from the baboon, the bovine, and the equine. Close parallelism was seen between dose response curves for ...
-
(Texas A&M University. Libraries, 1981)
-
(Texas A&M University. Libraries, 1986)A series of experiments was conducted to develop a procedure for consistent, repeatable collection of oocytes from the pre-ovulatory follicle of the mare. Experiment 1 resulted in the collection of 26 oocytes from 30 equine ...
-
(Texas A&M University. Libraries, 1994)The hypothesis that the type of dietary fatty acid consumed by the cow differentially affects both luteal and follicular function through altered synthesis of lipoprotein-cholesterol and secretion of metabolic hormones was ...
-
(Texas A&M University. Libraries, 1994)Bilateral (BOVX) and unilateral ovariectomized (UOVX) beef heifers were utilized to ascertain whether the inhibitory effect of a progestin (norgestomet, NOR) on LH secretion is mediated via both the hypothalamus and the ...
-
(Texas A&M University. Libraries, 1987)This study was designed to determine the effects of relocation and season on growth and reproductive parameters of Brahman and Hereford bulls. Hereford bulls from Montana (n = 15) and Nebraska (n = 15) and Brahman bulls ...
-
(Texas A&M University. Libraries, 1967)This study was conducted to obtain data on the effects of low level continuous gamma irradiation at levels of 0, 2R, 7R, 30R and 40R per 20 hour day for the lifetime of the individual. Twelve males and 11 females were ...
-
(Texas A&M University. Libraries, 1980)A series of three experiments were undertaken characterizing the Brahman cow as a seasonal breeder. The addition of light to create a daylength of 14 hours appeared to increase the reproductive capabilities of Brahman ...
-
(Texas A&M University. Libraries, 1985)Three experiments were conducted to investigate the effects of negative energy balance (NEB) on reproductive activity in cattle. In experiment I the interrelationships of body weight (BW), retained energy (RE), plasma ...
-
(Texas A&M University. Libraries, 1964)
-
(Texas A&M University. Libraries, 1993)The effects of rations (fed at 1% of BW) containing highly degradable intake protein (DIP) vs rations with fishmeal (FM), a more undegradable intake protein (UIP), were studied. Thirty-nine Brahman bulls (301.7d; 202.7kg) ...
-
(Texas A&M University. Libraries, 1995)Endocrine and ovarian responses in Brahman cows stimulated with two different superovulatory treatments were examined. In Experiment 1, plasma progesterone (P4) concentrations were not affected (P>.40) by breed (Brahman: ...
-
(Texas A&M University. Libraries, 1993)Efforts to breed the endangered Asian elephant in captivity have historically been difficult because of our primitive understanding of musth. Long-term endocrinological studies of musth are needed; however, it is often ...
-
(Texas A&M University. Libraries, 1987)The influences of age and dietary energy intake on the hypothalamic-hypophyseal-testicular axis of developing Brahman bulls are not well understood. Two experiments were conducted to examine these relationships. In the ...
-
(Texas A&M University. Libraries, 1992)Studies were performed to evaluate postpartum (PP) hormonal profiles in beef cattle. One study examined the effect of aspirin (A) feeding on PP endocrine profiles and reproductive function. The second study evaluated the ...
-
(Texas A&M University. Libraries, 1987)Brahman-cross cows (day 11 or 12 of the estrous cycle) were used to study the effects of prostaglandin-induced luteolysis on the corpus luteum (CL). Four cows (0 h controls) were injected (sc) with saline while 16 cows ...
-
(Texas A&M University. Libraries, 1980)A study was conducted to determine the fertilization rate, incidence of embryonic mortality by day 35, and luteal progesterone secretion (in vitro) in Brahman crossbred heifers. On hundred fifty-five virgin heifers were ...
-
(Texas A&M University. Libraries, 1972)Ten primiparous heifers were used in this experiment to evaluate the effects of suckling and nonsuckling on return to estrus and circulating serum levels of luteinizing hormone and prolactin. Three suckled heifers returned ...
-
(Texas A&M University. Libraries, 1986)Differentiation of granulosa cells (GC) into luteal cells and mechanisms subserving attainment of puberty are two areas of interest in reproductive endocrinology of the bovine. The first study described herein compared GC ...