Changes of saturated fatty acid (SFA), unsaturated fatty acids (UFA), monounsaturated fatty acids (MUFA), and polyunsaturated fatty acids (PUFA) proportions, boar sperm were treated with 100 mM NaHCO3 and 50 µM progesterone, a,bValues with differents uperscripts in the same fatty acid column (p < 0.05).