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| | Estrus in Swine |
 | | Estrus detection can be improved by observing sow behavior while the boar is given direct contact with the sow. | | | Understanding and managing estrus in swine is important because estrus may be thought of as the starting point of the swine herd life cycle. | | | Sows in estrus will often assume this rigid stance, called the lordosis reflex, when pressure is applied on the rump ("back-pressure") by the herdsman. |
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http://cal.vet.upenn.edu/swine/bio/fem/estr/hm.html
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| | repro failure |
| | The signs of estrus (increased vocalization, rubbing, lordosis, and treading of the hind legs when exposed to a male) should be reviewed with the client to establish that estrus can be detected when it occurs. | | | These conditions are characterized by a cyclic and seasonal pattern to the periods of estrus. | | | If the female cannot be induced to exhibit estrus behavior, and the client insists on breeding, then artificial insemination can be attempted during cytologic estrus. |
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http://www.vetmed.lsu.edu/eiltslotus/theriogenology-5361/repro_failure.htm
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| | Merck Vet. Edition - Irregularities of Estrus and Anestrus |
| | The vaginal mucosa is edematous, the cervix is relaxed and hyperemic, and a variable amount of clear serous mucus is frequently seen at the vulva, which is puffy and swollen. | | | Because these cows lack only behavioral signs of estrus, endocrine treatments are not indicated. | | | Silent heat refers to normal follicular development and ovulation without the behavioral signs of estrus. |
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http://www.merckvetmanual.com/mvm/htm/bc/181004.htm
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| | Using Artificial Insemination in Swine Production: Detecting and Synchronizing Estrus and Using Proper Insemination ... |
| | Group weaning serves as an effective tool for synchronizing estrus since sows in good body condition whose sucklings are weaned after a two- to four-week lactation generally display estrus in four to seven days. | | | On the other hand, altrenogest alone is highly effective in synchronizing estrus in mature, randomly cycling gilts, but is at best marginally effective at stimulating estrus in prepubertal females. | | | With this system, only sows experiencing a delayed return to estrus are treated with P.G. Prepubertal gilts. |
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http://www.ext.vt.edu/pubs/swine/414-038/414-038.html
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| | Gilt Estrus Synchronization |
| | This technique is effective, but the increases in age at first farrowing and nonproductive sow days are often difficult to justify. | | | However, the natural attainment of puberty is influenced by many intrinsic and extrinsic factors, such as genotype, environment and boar contact. | | | Under most circumstances, producers receive gilts when they are in a peri-pubertal stage of sexual development. |
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http://mark.asci.ncsu.edu/HealthyHogs/book1997/almond2.htm
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| | Estrus cycle - Wikipedia, the free encyclopedia |
| | Estrus refers to the phase when the female is sexually receptive ("in heat"). | | | The animal exhibits a sexually receptive behavior, a situation that may be signaled by visible physiologic changes. | | | A signal trait of estrus is the lordosis reflex in which the animal spontaneously elevates her hindquarters. |
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http://en.wikipedia.org/wiki/Oestrus
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| | When Should Dairy Cows Be Inseminated? |
| | Influences of the environment and managerial practices on behavioral estrus must be recognized so that failure or misdiagnosis of estrus is minimized. | | | However, research with large numbers of cows indicates that maximum conception rates may not be achieved using the a.m.-p.m. | | | With the recent advent of continuous observation of estrous behavior by radiotelemetric systems (HeatWatch®, DDx, Inc. Denver, CO), duration of estrus averaged 7 hours (range 33 minutes to 36 hours; Dransfield et al. |
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http://www.cahe.nmsu.edu/pubs/_b/B-117.html
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| | Merck Vet. Edition - Hormonal Control Of Estrus: Introduction |
| | Treatment with estradiol cypionate is long-lasting, but repeated or high doses may cause aggressive or defensive behavior when the mare is approached by a stallion. | | | The queen should be allowed an estrus before resuming therapy. | | | The most effective treatments for these manipulations vary among species. |
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http://www.merckvetmanual.com/mvm/htm/bc/181800.htm
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| | Canine Reproduction Part 2 |
| | Progestin therapy results in a high incidence of cystic endometrial hyperplasia and pyometra, and therefore when this approach is used, ovariohysterectomy is considered mandatory within 3 weeks following treatment to prevent these secondary complications. | | | As a result, the estrus stage does not follow the proestrus stage. | | | Occasionally, a bitch will enter proestrus and fail to enter estrus or will experience a very short estrus. |
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http://www.labbies.com/reproduction2.htm
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| | Equine Veterinary Research Program Newsletter Volume 7 Estrus Control |
| | If the ovaries are extremely small and the mare shows aggressive estrus-like behavior, then the mare may be a psychologic nymphomaniac, and the estrus-like behavior is unrelated to any hormonal activity on the ovary. | | | Repositol progesterone is not readily available, but must be given weekly to prevent estrus. | | | If permanent estrus prevention is desired, the ovaries can be surgically removed. |
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http://evrp.lsu.edu/07estrus.htm
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| | Veterinary Information - Reproduction in Dogs |
| | I have had several clients who were unable to fend off amorous males during estrus while walking their bitches on a leash. | | | Other females will exhibit this behavior when they are frightened, even if they are in true estrus. | | | For your situation, the first way to use it is probably better. |
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http://www.vetinfo.com/dogrepro.html
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| | estrus and hips |
| | There is not enough strong scientific evidence that estrus affects the laxity of the joints, despite what we used to think. | | | Still, there may be that other problem with our assumptions, which is (as I said above) that we were basing them on the old and imprecise leg-extended position. | | | If estrus affects ANYthing, it would be in the OFA-type legs-extended position, but that has not been shown to have statistical significance in any really controlled study. |
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http://www.gsdhelpline.com/hipeso.htm
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| | Dog Estrus |
| | It is during this stage most females will allow a dog, in fact ANY dog to breed her. | | | During this time the color of the blood has gone from bright red to pink and then to an almost clear discharge. | | | Explanation, occurrance, and symptoms of the dog Estrus, the heat cycle. |
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http://ri.essortment.com/dogestrus_rkpj.htm
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| | Manipulation of the Estrous Cycle (estrus synchronization or induction) |
| | This method employs treatment with progesterone for a period of time approximately equal to the luteal phase of the species. | | | When used in the transition period will resolve some of the transitional follicles and erratic estrus behavior that goes with them. | | | During the course of treatment any luteal structure that may be on the ovary also undergo regression. |
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http://www.vet.purdue.edu/vcs/Peter/manipulestrouscycle.html
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| | Electronic estrus detector (US4895165) |
| | means for determining that a second condition has been satisfied, wherein said second condition is that the sum of all estrus mount times is at least equal to the desired sum of all estrus mount times; and | | | means for determining that a first condition has been satisfied, wherein said first condition is that the sum of sensed estrus mounts is at least equal to the desired sum of sensed estrus mounts; | | | means for programming a desired sum of sensed estrus mounts; |
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http://www.delphion.com/details?pn=US04895165__
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| | Artificial Insemination Of Dairy Goats |
| | Observing does for heat detection only during chore time may result in estrus ewes being overlooked because of their change in behavior as they anticipate feeding. | | | For this reason, it is important to keep individual reproductive records on each doe. | | | Accurate records should be maintained, including time of heat, length of heat and length of time between heat periods. |
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http://www.cahe.nmsu.edu/pubs/_d/d-704.html
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| | Estrus |
| | Evidence of the animal being in heat is signalled by leakage of blood from the vagina, or other changes in secretions and urinary habits. | | | Although sexual responsiveness is influenced by social and cultural factors, there is evidence that human females undergo emotional and physiological changes associated with estrus cycles and may be more likely to be irritable and/or sexualy aroused during the peaks of heat cycles. | | | In human females estrus is often associated with menstrual cycles, but some evidence suggests human females also undergo semi-annual heat cycles. |
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http://www.yotor.com/wiki/en/es/Estrus.htm
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| | * Estrus - (Dog): Definition |
| | Confusing terms for AKC dog show beginners How to raise a litter of puppies Dog Estrus Behavior of dogs... | | | Explanation, occurrance, and symptoms of the dog Estrus, the heat cycle. | | | Female dogs, or bitches, will mate only when in heat, or estrus, which occurs about every six months and lasts from 18 to 22 days. |
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http://www.bestknows.com/dog/estrus.html
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| | Reproduction and reproductive disorders in dogs and cats |
| | Since there is usually no obvious vaginal discharge or swelling of the genitals during estrus in cats, as is seen in dogs, behavioral changes are the only obvious signs that your cat is in estrus. | | | Estrus: This is the stage in which the female will accept the male and conception can occur. | | | Estrus (heat period): Pregnancy should have no effect on the next heat period. |
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http://www.uslink.net/~farnham/reproduc.htm
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| | feline estrus |
| | Feline Estrus, by: Dr. Bari Spielman Edited by: Dr. Rhea Morgan. | | | Estrus itself, the phase in which cats act a little crazy and are... | | | CFA Health Committee strives to improve the health of cats through awareness and communication and by obtaining data and information which will benefit... |
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http://www.cats-2005-2006.com/71/feline-estrus.html
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| | [No title] |
| | Therefore, even though the negative feedback effects of progesterone have been eliminated, the time to estrus may vary depending upon the maturity of the follicles present upon the ovary. | | | Furthermore, some cows will appear to be in estrus for abnormally long periods due to sympathetic behavioral responses to other members of the herd. | | | Estrus synchronization is a management technique which makes use of hormones to control, or reschedule, the estrus cycle. |
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http://web1.msue.msu.edu/msue/imp/modaa/23280001.html
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| | Illini BeefNet: Paper Display: Estrus Synchronization and Pregnancy... |
| | Studies have been conducted to research the use of MGA with other forms of synchronization, such as a PGF | | | Estrus synchronization and pregnancy data were analyzed as a chi-square analysis as described by Cochran and Cox (1957) with animals fed MGA or not fed MGA, and estrous cycles as anestrous or estrus-cycling, as main effects. | | | The injection of estradiol valerate (5.0 mg) and norgestomet (3.0 mg) was administered intramuscularly in the neck with an 18 g x 215; 1.5 inch needle at the time of implantation. |
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http://www.traill.uiuc.edu/beefnet/paperDisplay.cfm?Type=Both&ContentID=22
(1880 words)
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| | DASEES |
| | Data from this study demonstrate three important relationships. | | | Data from two experiments were used to study the relationship between weaning-to-estrus interval (WEI, varying from 3 to 6 d) and the duration of estrus, the interval from onset of estrus to ovulation and fertilization results at 120 h after ovulation, in 201 multiparous sows. | | | This increase occurred similarly in all weaning to estrus intervals. |
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http://www.fass.org/dasees/animalhealth
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| | Knox et al., April 2001 |
| | Follicle size at estrus was not affected by treatment (P > 0.10). | | | Further, multivariate analysis showed an effect of treatment on the intervals from weaning to estrus, weaning to ovulation (P < 0.0001), and estrus to ovulation (P < 0.04). | | | Perhaps one way to account for this effect would be to breed sows based on the duration of estrus because most sows ovulate approximately three-quarters of the way through estrus. |
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http://www.asas.org/jas/abs/2001/a0140796.htm
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| | Monitoring Estrus for Frozen Semen Use |
| | This means that it is not a guaranteed method of inducing timely estrus, as if the mare is producing what in effect becomes a mid-cycle ovulation, it will throw her natural cyclical activity into an erratic state. | | | The estradiol (estrogen) portion of the mixture suppresses the ovulation of any follicle present, and allows the progesterone to achieve the effect that is desired, but often doesn't occur, by it's use alone. | | | Where the problems arise, are in the mares that do not respond to the hormone use as anticipated, most commonly as a result of the hormones being administered at the wrong point in her cycle (especially PGF2α), or the presence of a large mid-cycle follicle. |
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http://www.equine-reproduction.com/articles/moni.htm
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| | Influence of time of insemination after the onset of estrus on |
| | Estrus was induced by treatment with PGF | | | With the use of radiotelemetry to accurately determine the onset of estrus, it may be possible to improve reproductive performance. | | | The objective of this experiment was to determine the effect of time of artificial insemination (AI) relative to the onset of estrus on pregnancy rate of beef heifers. |
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http://www.ansi.okstate.edu/research/2004rr/26/26.htm
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| | ANS 431: Estrous Cycle |
| | Non-menstruating animals Estrus to Luteal Phase to Follicular Phase to Estrus b. | | | Luteal Phase C. Metestrus, Diestrus, Proestrus, and Estrus 1. | | | Introduction of Buck during transition also causes synchrony of estrus i. |
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http://www.siu.edu/~tw3a/431estcy.htm
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| | Synchronizing Estrus In Beef Cattle, EC00-279-A |
| | Under normal conditions, about 5 percent of the cyclic females will be in estrus on any given day. | | | Cyclic females may be grouped into one of three categories based on structures present on their ovaries. | | | Females can be time inseminated but conception rates are variable. |
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http://ianrpubs.unl.edu/beef/ec279.htm
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| | Heat Cycles and Pregnancy in Cats: Breeding Tips from HDW Enterprises and Foothill Felines Bengals. |
| | The length of time of the estrus, and the frequency of the estrus cycles depends upon many factors, such as geographic and environmental factors, (temperature and the number of daylight hours), her age and overall health, and her genetic background. | | | Once a queen goes into heat or estrus, she may stay in heat for several days, to 2-3 weeks. | | | However, their behavior changes greatly, with the majority of queens becoming quite vocal and loud, and showing increased signs of affection. |
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http://www.hdw-inc.com/pregnancy.htm
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| | Estrus |
| | Estrus - greatest female sexual responsiveness usually coinciding with ovulation. |
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http://www.websign.sk/es/Estrus.html
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| | How To Use the Milk Progesterone Tests, G86-818-A |
| | Studies have shown that 10 to 20 percent of the cows inseminated were not in estrus at the time of insemination and consequently had no chance of conceiving. | | | Therefore, the test is most accurate in identifying cows that should not be inseminated, because if the progesterone levels are high she cannot be in estrus. | | | This guide discusses the basis for milk progesterone tests, using the test to confirm estrus, as an early indicator of pregnancy, and the availability and costs of kits. |
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http://ianrpubs.unl.edu/dairy/g818.htm
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| | ESTRUS SYNCHRONIZATION |
| | The 21-day estrous cycle, diagrammed in Figure 6, shows the corresponding changes that occur on the ovary: follicles (blister-like structure on ovary containing egg/ovum) produce estrogen to cause female to be sexually receptive by exhibiting "heat or bulling" (estrus); the corpus luteum (CL; yellow body) which produces progesterone and keeps the female out of heat. | | | It is also very important that the entire implant be removed or animals will not come into heat. | | | Currently MGA is not labeled for synchronizing estrus in heifers; however, a label change is being sought. |
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http://www.ag.unr.edu/ab/Extension/Heifer/06.htm
(1974 words)
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| | Estrus Records - Epitonic.com: Hi Quality Free and Legal MP3 Music |
| | This site may be viewed in any browser or Internet device, but looks best in one that complies with web standards. | | | If you like your rock hard, dirty, and mean, then Estrus Records is undoubtedly the label for you. | | | Estrus Records - Epitonic.com: Hi Quality Free and Legal MP3 Music |
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http://www.epitonic.com/labels/estrusrecords.html
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| | Midheaven Mailorder Browse by Label: Estrus |
| | Ten solid and inspired tracks that blend a world of influences and sounds, to create exactly what you'd expect--a spark of emotion and an explosion of feeling. | | | ***Another year, another onslaught of fire-breathing, shit-storming, rubber-burning, booze-guzzling, adjective-laced rock'n'roll sounds from the Estrus family of fun. | | | Led by MONO MEN and WATTS guitarist and Estrus head honcho DAVE CRIDER, the band unloads ten fire-fueled tracks of sweaty soul swagger and loud, hard rock stagger, burned up with the gutsy, shit-hot vocals of DIANA YOUNG-BLANCHARD, and the fat-bottomed organ of PATTI BELL. |
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http://www.midheaven.com/labels/nonexc/estrus.html
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| | HeatWatch® Estrus Detection System |
| | The HeatWatch® Estrus Detection System operates 24 hours a day, 7 days a week, identifies the precise onset and duration of standing heat, and is very easy to use. | | | After using it for a while, he will begin to wonder how he ever did without it! | | | HeatWatch® detects standing heat with better than 95% accuracy and efficiency. |
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http://www.heatwatch.com
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