Cervical length fluctuating from 23mm to 36 mm — confused
Hi! I’m 18 weeks, with a history of conisation, and my CL measurements have been:
12w: 37 mm
16w: 23-25 mm
Started vaginal progesterone (200 mg)
Next day: 30-35 mm
17w: 35-36 mm
My doctor thinks the 23–25 mm measurements may have been transient/measurement-related (she mentioned urinating/temporary spasm) and is reassured by the later measurements.
I’m struggling because I feel like I’m just waiting for something bad to happen. Could 25 mm have simply been an early sign of shortening despite the later normal measurements?
Also, I find it hard to believe progesterone could make such a difference after just one day. My doctor said I could stop it based on the current measurements, but I’m tempted to continue for peace of mind.
I’ll be measured again this week (18w) and on my 2nd trimester scan (20w).
Would you follow your doctor’s advice or continue progesterone for reassurance? Has anyone experienced this kind of CL fluctuation?