The purpose of the study is to find out whether indomethacin encapsulated within a nanovector can stop contractions in pregnant human uterine tissue. Preterm delivery is a major contributor to newborn deaths. The treatment of preterm labor includes medications that stop contractions within the uterus, or womb. Indomethacin is effective in stopping uterine contractions, but crosses the placenta to the unborn baby causing problems for the baby. Nanovectors are used to direct the delivery of medications. If indomethacin can be delivered directly to the uterus using a nanovector, it may be an ideal medication to treat preterm labor. We hypothesize that nanovectors loaded with indomethacin will reduce uterine contractions.