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A 23-year-old female asked:

Normal anatomy scan at 18 weeks except twin as placenta is marginal anterior & there is a very small blood clot over my cervix. do these things put me at a significant increased risk for miscarriage? mfm just said recheck in 4 weeks. nervous?

1 doctor answer2 doctors weighed in
Dr. James Ferguson
Pediatrics 47 years experience
Marginal & anterior placentas do occasionally migrate/have clots form. Losses occur with any pregnancy and some increased risk is likely but it is not something they can fix. It does suggest you will eventually deliver by C-section. Follow the recommended diet & precautions. Re-checks will allow them to know when or if other things need to be done.

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