Thanks for writing to us.
A cervical polyp
is not likely to cause the miscarriage
at 18 weeks of pregnancy
. Since there was a continuous bleeding present, this might have caused the cervical canal to open up leading to the premature delivery. You need to rule out cervical incompetence
before planning for next pregnancy.
I hope this information has been both informative and helpful for you. You can consult me again directly through my profile URL http://bit.ly/Dr-Rakhi-Tayal