You will find a lot more on this in the US. The advice there also seems to be different with regards to pregnancy.
Nhs advice here seems to be to only get the vaccine if you are pregnant if you are in a high risk group as there is apparently no greater risk from covid if you are pregnant. And the vaccines are untested on pregnant women.
In the US there are reports that there is increasing evidence that covid can be a higher risk when pregnant. Also reports that preliminary analysis from vaccines is no worse side effects or adverse outcomes for pregnant women taking the vaccine.
Of course the US is using some different vaccines to the UK.
There was an interesting post with lots of links on the Dear Pandemic page on Facebook.