Different lengths of diet supplementation with 10% flaxseed alter the hormonal profile and the follicular fluid fatty acid content of fattening gilts / Martina Lecová, Diana Babjáková, Drahomíra Sopková, Zuzana Andrejčáková, Zdenka Hertelyová, Vladimír Petrilla, Magdaléna Polláková, Radoslava Vlčková KE304