Sixteen eSTs (#49, #172, #192, #217, #234, #245-247, #252, #254, #256-261) were found only in PTL, whereas 10 eSTs (#15, #82, #111, #147, #167, #233, #240, #248, #249, #262) were identified only in PPROM. The gene discussed is PNLIP; the disease is preterm premature rupture of the membranes.