This paper records observations made on conception in sows treated with a long-acting androgen-oestrogen mixture. The observations were made as part of an experiment originally undertaken to examine the value of treatment with this agent for the diagnosis of pregnancy in pigs. It has previously been observed that administration of a similar mixture was followed by heat in cattle previously showing ovulation in the absence of heat. By the same treatment an ovulatory heat was induced in anoestrous, barren animals, but existing pregnancies were not disturbed (Jöchle, 1964). It seemed probable that the existence of pregnancy would be established if heat failed to occur following administration of the agent.Two milligrammes oestradiol valerate and 5 mg testosterone enanthate were administered to sows 9 to 12 days following service. The experimental group comprised ninety-eight German Landrace
If the inline PDF is not rendering correctly, you can download the PDF file here.