Partner doesn’t want my mum there

I’m 31 weeks with my first child

Thinking about birth, I’d really like my mum with me along with my partner as well of course

Well my partner is adamant that it should just be us two and wants my mum not even at the hospital at the time

He’s not willing to discuss it whatsoever

Is it unreasonable for me to want her their for me? I’m not limited to restrictions so can have both with me if I want. I’m 23 and would just really like my mums support but don’t want to go against my partner