Abstract
To assess the effect of the angiotensin-converting enzyme (ACE) inhibition on the efficiency of the fixed-time artificial insemination (TAI), 69 goats were divided randomly into two groups: enalapril (n=35) and control (n=34). In the experiment, all animals underwent the protocol of fixed-time artificial insemination for 12days. Enalapril group received enalapril maleate dissolved in saline (Enalapril, Lab Teuto Ltda) subcutaneously at the following doses: 0.2mg/kg/day in D0-D2; 0.3mg/kg/day in D3-D6 and 0.4mg/kg/day in D7-D11. The control group received the corresponding volume of 0.9% saline solution. We performed a single insemination 36hr after sponge removal using frozen semen from two adult male goats with recognized fertility. The ultrasound pregnancy diagnosis was 30days after the artificial insemination (AI). There was significant increase in pregnancy rates and twinning as well as a decrease in foetal loss in animals receiving enalapril (p<.01). The use of ACE inhibitors during the TAI protocol was shown to be a promising alternative to increase the efficiency of such reproductive biotechnology.
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