Relative mRNA expressions of follicle formation and development in the ovary of the fetus. g55, at Day 55 of gestation of fetus; g90, at Day 90 of gestation of fetus; aat, alpha-1-antitrypsin; grp78, 78-kDa glucose-regulated protein; gen, gelsolin; afp, alpha-fetoprotein; sohlh2, spermatogenesis and oogenesis-specific basic helix-loop-helix 2; nobox, newborn ovary homeobox gene; lhx8, LIM homeobox protein 8 (n = 4 for each group; the samples were from four gilts and each gilt provided two fetuses; the calculated average values of the two fetal ovaries for each gilt were used in the statistical analysis); * p < 0.05. The data were normalized to g55 of the CON group.