Another study on Premature babies and autism - immune system link? http://www.telegraph.co.uk/health/c...n-a-week-early-at-greater-risk-of-autism.html Of course early babies have underdeveloped immune system, putting them at greater risk of infections, but there is also this... Indicating that preterm labor could happen BECAUSE of an ongoing infection http://blogs.monografias.com/sistem...as/2010/04/26/the-enigma-of-premature-births/ Pathogenic infections are one of the lead suspects for causing preterm birth. In fact, they could account for about 25 percent of all unexplained premature deliveries, Muglia said. Certain infections can activate the immune system the bodys natural defense against harmful organisms. In a pregnant mother, putting the immune system on overdrive might trigger preterm labor. This might happen because the moms immune response thats fighting the infection creates a hostile environment for the fetus, prompting early delivery, said Dr. Diane Ashton, the deputy medical director at the March of Dimes.