Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Sometimes with progression of pregnancy painless contractions can be seen, which is called as Braxton hicks contractions. These usually start in early pregnancy itself, but can be appreciated better in late second trimester. This will not lead to labor pains usually. If the contractions are continuous, better to undergo ultrasound once to rule out the possibility of preterm labor. Hope I have answered your query. Let me know if I can assist you further.