Biotechnical regulation of reproduction in female swine

Based on profound biologic knowledge, several methods to control and regulate porcine reproduction (induction of puberty, synchronization of estrus and ovulation, fix-time insemination, induction and synchronization of parturition) have been developed and improved during the last 35 years. However, considerable new findings are missing during the last 10 years. Substantial progress was achieved using ultrasound-guided ovarian and pregnancy diagnosis. Considerable success has been attained in the field of assisted reproductive techniques (embryo transfer, cryoconservation of embryos, in vitro maturation and fertilization, somatic cloning). Increasing efficiency of these techniques could push as well as pig production and biomedicine. Future research should be directed to the biology of embryonic and fetal development to achieve stable litter size with balanced piglet weights.

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