The main sign of placenta previa is bright red vaginal bleeding, usually without pain, after 20 weeks of pregnancy. Sometimes, spotting happens before an event with more blood loss. The bleeding may occur with prelabor contractions of the uterus that cause pain. The bleeding may also be triggered by sex or during a medical exam. For some women, bleeding may not occur until labor. Often there is no clear event that leads to bleeding.
sign placenta previa bright red vaginal bleeding  pain  20 weeks pregnancy  sometimes  spotting happens event blood loss  bleeding may occur prelabor contractions uterus cause pain  bleeding may triggered sex medical exam  women  bleeding may occur labor  clear event leads bleeding
placenta previa