The experimental groups were divided into sows inseminated by: 1) cervical artificial insemination (CAI): 3 × 109 spermatozoa/80 ml; 2) post-CAI: 1.5 × 109 spermatozoa/40 ml (post-CAI 1); 3) post-CAI using 1 × 109 spermatozoa/26 ml (post-CAI 2). Post-CAI 1 reproductive parameters were similar to those of post-CAI 2 (except for live born litter size which was greater in post-CAI 1) and better than for the CAI group (p < 0.01).