Clinical trial of a PMSG/HCG preparation combined with natural oestrus induction in sow herds with oestrous problems.
The effect of a consistent programme for oestrus control and oestrus induction has been investigated in some herds with oestrous problems already participating in the efficiency control programme (RASP). Forming part of the project was a clinical trial of a PMSG/HCG preparation (SUIGONAN VET.) to be applied in cases where natural stimulation of sows did not lead to oestrus. The other herds participating in the efficiency control programme of the same area were used as control herds. In the trial herds the below treatment programme was followed: Gilts not showing oestrus at the age of 8 months were treated with hormones. Sows which had farrowed at least twice and did not show oestrus less than 10 days after weaning were also treated with hormones. All primiparous sows were treated with a hormone preparation on the day after weaning. These animals were observed during an additional reproduction cycle to demonstrate the possible negative effect of the hormones on the following oestrus/pregnancy. The results of the gonadotropin treatment of gilts and older sows were not encouraging. However, the treatment may have a certain prognostic value as slaughter should be considered in cases where the sows do not show signs of oestrus within a week after treatment. The results of the treatment of primiparous sows were satisfactory with respect to oestrus as well as to the result of parturition after service. Treatment of primiparous sows on the day after weaning must be limited with regard to time (max. 1--2 months) to remedy occasional oestrous irregularities which it has not been possible to cure by natural oestrus induction.
D000780:Anestrus / Q000187:drug effects*; D000818:Animals; D006063:Chorionic Gonadotropin / Q000494:pharmacology* / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D004338:Drug Combinations / Q000494:pharmacology / Q000627:therapeutic use; D004971:Estrus / Q000187:drug effects*; D005260:Female; D006064:Gonadotropins, Equine / Q000494:pharmacology* / Q000627:therapeutic use; D007247:Infertility, Female / Q000188:drug therapy / Q000662:veterinary*; D008098:Litter Size / Q000187:drug effects; D011247:Pregnancy; D013552:Swine; D013553:Swine Diseases / Q000188:drug therapy*
D006063:Chorionic Gonadotropin; D004338:Drug Combinations; D006064:Gonadotropins, Equine; C036835:PMSG-HCG