Following delivery placental biopsies will be obtained for possible further analysis in anticipation of extramural funding pending the results of this study. For each placenta, three small full-thickness samples approximately 2 cm x 2 cm x 2 cm, not to include fetal membranes, will be obtained and stored in a -80ºC freezer pending mRNA extraction. We will follow a standard protocol for placental tissue harvest. The remainder of the placentas will be disposed of per routine on the Labor and Delivery unit.