The results showed that current infection was detected in 66% (33 of 50) of the pregnant women with anti-Toxoplasma IgG, IgM, and IgA, and in 30.5% (32 of 105) of those with specific IgG and IgM antibodies, with a statistically significant difference (p < 0.05) between the two groups with evidence of recent infection. The gene discussed is CD40LG; the disease is infection.