Soft cervix at 21 weeks

Stephanie • Married 2 years, 4 baby losses. Jun 2017, chemical. Dec 2017, missed miscarriage. Jul 2018, ectopic, lost left tube. Nov 2018, missed miscarriage.

Anyone experience this? It was discovered I had some debris in my amniotic fluid so the MFM checked my cervix and said it’s soft so he wants me to start prometrium again. I left without thinking too much, otherwise I would have asked him these questions myself, but now that I’m looking into it, it’s freaking me out.

They didn’t mention a weak cervix when measuring my cervical length. He only said it was soft after examining it before the end of the appointment.