AP complement activities in seminal plasma and female genital tracts in non-mating season. AP complement assays of porcine serum, seminal plasma, and fluids from porcine female genital tract ducts such as the vagina, uteri, uterus cornu, and ovarian fluid were carried out on LPS-coated 96-well immunoplates as described under “Experimental Procedures.” Each bar represents the mean ± S.E. for five pigs.