My friend had cervical length of 3cm during NT scan at 13 weeks...after doing anamoly scan at 20 weeks the cervix length is reduced to 2.4 cm..this is her first pregnancy. She has abdominal cramps. 1. Is this cause for concern. 2. Should she be on bedrest 3. How can cervical length monitored during subsequent weeks to make sure it has not effaced much before due date?
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