Abortion laws in europe isn't decided by our most liberal parties.
The first trimester rules you mentioned are usually what everyone can agree on.
Example one: In my country (Sweden), a high-ranking party-poard member of our conservative christian party just got into a lot of trouble because it was found out that they had been a member of an anti-abortion organization 10 years ago, and now had to publicly state that they now support the first-trimester abortion rules (Personally, I think it's a lie, but this is what you have to do over here to not ruin your political career, even in the conservative christian party).
The first trimester rules you mentioned are usually what everyone can agree on.
Example one: In my country (Sweden), a high-ranking party-poard member of our conservative christian party just got into a lot of trouble because it was found out that they had been a member of an anti-abortion organization 10 years ago, and now had to publicly state that they now support the first-trimester abortion rules (Personally, I think it's a lie, but this is what you have to do over here to not ruin your political career, even in the conservative christian party).