@Piggywaspushed I don't know if that post was aimed at me, but what I have written is not "my interpretation," it is the Government guidelines which are available to all on the gov.uk website.
Pregnant women were and are included on the broader vulnerable group, more as a "rather safe than sorry" measure than the fact there is any research indicating that they are more vulnerable to caching Covid.
However, there is a subset of pregnant women who are extremely vulnerable and this is pregnant women who are significant heart disease, congenital or acquired. There were and are advised to shield for 12 weeks.
It was never announced that all pregnant women are "extremely vulnerable." Please do not spread things like this as it causes confusion, as can be seen on this thread.
Government guidance on who is extremely vulnerable and therefore require shielding for 12 weeks is here.
Government guidance on who is vulnerable is here.