Midline closed cervix

Beth • 21/03/2018. 11:36am. 7lb 9oz GEORGE ELLIOTT FISHWICK 🥰 expecting a baby girl 💖due 09.03.2020 xo

I have been in and out of hospital with preterm labour 😢 in my hospital notes it says cervix midline closed! Does anybody know what this means! It’s really getting at my head! I can’t find anything about it online!

Hope you can help