In contrast to abruptio placenta, what is true about placenta previa?

Placenta previa is a condition where the placenta is abnormally placed over the cervical opening, which can lead to complications during pregnancy and delivery. One of the key characteristics of placenta previa is that it may present without significant abdominal pain, differentiating it from other conditions like abruptio placenta, which is associated with more intense pain.

Patients experiencing placenta previa often notice painless vaginal bleeding in the later stages of pregnancy, which can be a hallmark symptom. This absence of significant abdominal pain makes option B particularly true when distinguishing it from conditions related to placental abruption, where pain is a significant symptom.

In contrast, abruptio placenta typically involves significant abdominal pain as the placenta detaches from the uterine wall, along with potential heavy bleeding. Thus, the lack of pain is a crucial aspect that helps in the identification and differentiation of placenta previa from other obstetric complications.