| abstract |
A method of feeding reproductive female pigs which comprises giving at least one lipid selected from among C12-24 fatty acids having a melting point of from -60 to 40°C and an iodine value of from 30 to 470 and carrying 2 to 6 double bonds per molecule, triglycerides containing these fatty acids and metal salts of these fatty acids; and feeds for reproductive female pigs which contain from 0.5 to 10% by weight, in terms of the above-described fatty acid(s), of the above-described lipid(s). This feeding method makes it possible to improve the reproduction achievement of pigs through a further increase in litter size, an increase in weanlings, shortening of the estrus recurrence period, an increase in the annual average farrowing frequency, etc. |