| abstract |
(57) [Summary] [Purpose] To improve the reproductive efficiency of sows. [Structure] Additives for feed for sows containing active folic acid (in the form of leucovorin, H 2 folic acid, liver powder, microbial cell crushed product or microbial cell extract) as an active ingredient, such feed additives A feed for a sow containing a product, and a method for raising a sow by orally administering such an additive or feeding with such a feed. |