When i had DD (homebirth) they listened in with a doppler every 20 minutes through a few contractions to make sure her heartrate was ok. They also asked me if she was still moving in between each doppler check (which she was).

You are right that being able to move makes a MASSIVE difference to how much room there is through the pelvis. Squatting/all-fours can apparently give as much as 20% more room! That's a massive amount! I've not seen the Pink Kit but i've only heard good things so it's probably worth getting one.

Induction often leads to foetal distress, babies begin the labour when they're ready - if they're not in quite the right position they'll try to shift but induction contractions can be quite aggressive and because baby isn't in control distress isn't uncommon.

True cephalo-pelvic disproportion (pelvis too small/baby too big) is very very rare. It's something associated more often with women who've had illnesses such as polio, which can distort and twist the pubic arch. In the western innoculated world it's usually found in women labouring on their backs, who cannot move due to monitoring/epidural.

I feel a bit GRRR at your Ob as he shouldn't be telling you your pelvis is too small arbitrarily, and it's something obs say a lot after c-sections! An experienced midwife can measure you with a pelvic exam and will be able to tell you how much room you have (most likely lots!).

You shouldn't have to think about if they'll "let" you VBAC - this is YOUR birth. You have to live with the consequences however it all turns out, thus it's up to you how to do it all. You are learning already about all the considerations, you are empowering yourself right NOW. You can FIND an ob who will support your VBAC. Janet even birthed VBAC unassisted - your body can do it. You're doing such a great thing researching before you ttc. Well done hon, and best of luck with it all.

Bec