Patient's question:
Sure, here is the translation of the content you provided:```
No
```
Doctor's answer:
Placenta previa can be classified into marginal placenta previa, partial placenta previa, and complete placenta previa. There is no such thing as a low in studies; it is possible to have sexual activity during the second trimester. It is best to adopt a left lateral position during pregnancy. Otherwise, it may compress the uterine artery, affecting the fetus.