Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0231807 (exertional dyspnea)
 3,402 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The aim of this research was to study the effect of changing female stimulus on libido and semen characteristics from young Murciano-granadina male goats submitted to intensive semen collection using females not in estrus as teasers. Males were submitted to two different sexual stimulation procedures. In the first procedure, the same doe was used as the female stimulus for three consecutive presentations. In the second, the doe was replaced after the second presentation by a new female. Semen volume, concentration, forward progressive motility, and live spermatozoa were scored. To analyze reaction time (RT), three types of analysis were performed. In the first one, RT was analyzed by multifactor ANOVA, taking as a missing value 300 s when a buck did not ejaculate. In the second, RT also was analyzed by multifactor ANOVA, but data from males that did not ejaculate were removed. In the third, a Cox Survival analysis was carried out by censoring data when a buck did not ejaculate within 5 min of entering the test arena. A decrease in semen volume and sperm concentration in the successive ejaculations was observed, being highly marked in the third ejaculation independent of the stimulation procedure (0.62 vs. 0.38 and 0.43 mL, and 2,828 vs. 2,183 and 2,223 million spermatozoa/mL to the first and third ejaculation respectively; P < 0.05). No significant differences were observed either in forward progressive motility or live sperm rate. Changing the female stimulus in the third presentation had no significant effect on any seminal characteristic. Regarding libido and mounting behavior variables, there was a substantial decrease in RT in the third service when the female was changed (with both types of ANOVA). When censored data were taken into account, the relative risk showed that the probability of a male ejaculating in the third presentation increased almost fourfold when the female was replaced than when the female was the same in all services (P < 0.05). In conclusion, young Murciano-granadina bucks can be used as semen donors because none of the most important semen variables used to reject or accept an ejaculate before freezing process decreased after intensive semen collection. We also recommend changing the female stimulus to make the semen collection procedure more efficient and using survival analysis methodology to analyze time data, mainly when a high rate of censored data are scored.
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PMID:Effect of changing female stimulus on intensive semen collection in young Murciano-granadina male goats. 1521 89

Forty-two mature Baladi female rabbits were used in a randomized 3x2 factorial experiment to determine the effects of three treatments (control, progesterone injection: 2 mg/doe and DES injection: 0.1 mg/doe) and two semen sperm cell concentrations (1x10(6) and 60x10(6) sperm/0.25 ml semen on sperm transport and distribution in the female reproductive tract. The injections were given for three consecutive days after which rabbits were injected with 5 IU HCG and inseminated with 0.25 ml semen. The does were sacrificed 10 hrs after insemination and the sperm were recovered and counted from the oviducts, uterine horns, cervices and vagina. Total spermatozoa recovered was high when rabbits were inseminated with 60x10(6) sperm as compared to those inseminated with 1x10(6) sperm. When rabbits were injected with progesterone or DES, the number of sperm recovered relative to the total number of sperm inseminated was high in rabbits inseminated with 1x10(6) sperm, in comparison to those inseminated with 6x10(6) sperm. The number of sperm recovered was highest from cervix which was followed by vagina, uterus and oviducts. DES increased the number of the total sperm recovered while progesterone decreased the number as compared to control. This trend was also observed within the different segments of the reproductive tract and with groups inseminated with 1x10(6) or 60x10(6) sperm/0.25 ml semen. The effect of DES was more obvious with does inseminated with low sperm numbers. Significant correlation coefficients were found between the sperm numbers recovered in the uterus and oviducts and in the cervix and uterus of all groups of rabbits.
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PMID:The effect of seminal sperm concentration on sperm transport in the reproductive tract of female rabbits treated with progesterone or diethylstilbestrol. 1672

Production of fawns by artificial insemination in captive White-tailed deer (Odocoileus virginianus ) has been accomplished by using frozen-thawed spermatozoa. The purpose of this study was to determine if frozen-thawed semen deposited at the posterior face of the os cervix could produce conception. Five hand-raised female White-tailed deer and one hand-raised male White-tailed deer were used over two breeding seasons 1984-1985 and 1985-1986. The vasectomized buck was ued to detect estrus in the does. The does were inseminated with frozen-thawed semen containing at least 100 million live normal cells with a 60% or higher motility. The artificial insemination catheters used in this study worked well, but due to the small size of the cervix, the catheter could only be passed up to the first cervical ring, the site at which the semen was deposited. Over two breeding seasons, nine does were inseminated with frozen-thawed spermatozoa; each doe was inseminated once each estrous cycle at one of the following times: 0, 6, 12, 18, 24 or 30 h. after detection of estrus. Of the nine does inseminated with frozen-thawed spermatozoa, six conceived and carried to term 11 healthy normal fawns, yielding an overall conception rate of 67%.
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PMID:A method of artificial insemination in captive White-tailed deer (Odocoileus virginianus ). 1672 25


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