Congratulations on your pregnancy!
I'm on my second pregnancy after a trachelectomy. I went to 37 weeks with my son and I'm now at week 30 with twins.
I was looked after very well and there were a few things that were done to make sure I got to a good term.
1) the progesterone pessaries twice a day. There's a lot of conflicting info about how effective these really are but the consensus is that they don't do any harm so probably worth doing
2) A transvaginal stitch which should be put in by week 12. This was to reduce the risk of infection as a mucus plug doesn't usually form for us trach ladies
3) fortnightly cervical length scans and to check for funnelling (cervix starting to open)
4) a lot of rest and lying on my side when cervical length went below 1cm. This happened at week 23 and I had to give up work. When I delivered I had about 2mm left of cervix.
there are so many trach ladies that have had successful pregnancies now. My consultant said they used to celebrate each one in the early stages but don't bother any more as its so common! So that's very comforting to know.
definitely go armed with info if they don't know much about it and push for what you want. i know lots of people have had the experience of doctors saying they don't need to do cervical length scans often or even at all but i think these scans are crucial as they are the best indicator of how the pregnancy is going.
Wishing you lots of luck!
all the best