Allyl trenbolone to control estrus in gilts -conception rate and litter size after treatment
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چکیده
منابع مشابه
Synchronization of estrus in gilts with allyl trenbolone: fecundity after natural service and insemination with frozen semen.
The synthetic progestogen, allyl trenbolone, was fed daily to 60 gilts at 15 mg/gilt for 18 days. Sixty-eight gilts that came into estrus the same week as treated gilts served as controls. Gilts were checked for estrus twice daily and were artificially inseminated with frozen semen or bred by natural service. All but two treated gilts returned to estrus between 4 and 7 days after withdrawal of ...
متن کاملLate estrus or metestrus insemination after estrual inseminations decreases farrowing rate and litter size in swine.
A study was conducted with 360 gilts and sows from four herds to determine whether fertility was affected when the final of multiple inseminations was performed in late estrus or metestrus (late insemination). Sows and gilts were inseminated at 24-h intervals immediately after the detection of estrus. After receiving a first insemination, females were paired according to parity and estrus statu...
متن کاملPharmacological intervention in swine reproduction
If gilts are known to be cyclic, the options to control estrus are breed-and-abort or feeding allyl trenbolone (Regumate®). For breed and abort, terminate pregnancy 25–30 days postbreeding with two injections of prostaglandin F2a (PGF2a), 6–8 hours apart. Gilts should return to estrus within 4–6 days with normal fertility. When feeding allyl trenbolone, you must ensure individual feeding so tha...
متن کاملConception Rate, Farrowing Rate and Litter Size after Intrauterine Insemination with Cryopreserved Boar Semen in Spontaneous and Induced Ovulation Sows
Introduction The procedure for artificial insemination (AI) in pigs using cryopreserved semen involves the deposition of a high number of cryopreserved spermatozoa (5-6 x10 cells) in a large volume of diluent (80-100 ml) into the cervix. Despite inseminating with this high sperm number, low fertility levels are usually obtained (about 20-30% conception and farrowing rates and 2-3 total piglets ...
متن کاملEffect of gonadotropin treatment on estrus, ovulation, and litter size in weaned and anestrous sows.
In the first of 2 experiments, we evaluated the effects on anestrous sows of pretreatment with FSH to stimulate the growth of small follicles, followed by eCG to stimulate the growth of medium follicles, estrus, and ovulation. In Exp. 2, we examined the effect of sows receiving 400 IU of eCG plus 200 IU of hCG (PG 600, Intervet/Schering Plough Animal Health, Boxmeer, the Netherlands) at weaning...
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ژورنال
عنوان ژورنال: Kansas Agricultural Experiment Station Research Reports
سال: 1979
ISSN: 2378-5977
DOI: 10.4148/2378-5977.6044