Similar to term<unk> 
Uterine contractions q 10 min (may be irregular)
New onset of vaginal mucus, blood, pink discharge, amniotic fluid
Low back ache, vaginal pressure
Preterm labor
Emergent delivery
Placenta previa
Placental abruption
Septic abortion
Vasa previa
Preeclampsia
Uterine rupture