OK, now I know that this is not an exact science and I'm not asking about how midwives/other health professionals actually measure because from what I've read they do that with the tips of their fingers.

My question is - if you naturally tense up a bit from having an internal, can it skew the measurement? Or is your cervix something that's not affected by how relaxed or tense you are. Obviously it's better to relax but ...

Just curious really.