I don't wanna go all Four Yorkshiremen, but when I had my 2 DC (mid 1990s) I got 14 weeks maternity leave in total. 14 WEEKS! So I finished work when I was 8 months pregnant, and went back when they were 10 weeks old. I would have given my left arm to have had a full year off.
It wasn't just a matter of affordability, (although we did need my salary as well,) my employer would never have allowed me to stay off any longer. I was allowed 14 weeks maternity leave and that was it. A temp covered my position for the 14 weeks, and then I had to go back. (It was the same for all women in the mid 1990s.)
It was horrible, I didn't love the job anyway, it was high stress, my boss was a lecherous cunt, and one particular woman above me in rank slightly was a bully, and she fucking hated me. (It emerged some time later that she was very jealous of me.) I was suffering from PND, and I was very weepy, and I went back to work 28 hours a week. (3 days one week/four the next etc,) and I basically still had 5 days work to do! I just got 'you've had a baby, you're not ill!' barked at me.
I deeply envied women who were able to be full time stay-at-home-mums.
NO woman had a full year's maternity leave in the mid 1990s. (Or earlier.) Not in the UK. The leave was 14-18 weeks up until the 21st century. It was well into the 2000s before maternity leave was increased. It was increased to 26 weeks around 2003-2004, and then 39 weeks around 2007. A couple of years after women were allowed to stay off a full year (but didn't get full pay for the last quarter of the time they were off.)
But yeah, no women was allowed to be away from their job for a full year in the 1990s on maternity leave. Any woman who was off a full year, must have left their job, and then applied for/started a new one when they baby was a year old. No employer - in the 1990s - would have held your job open whilst you had a full YEAR maternity leave.