Female animals who do not all reproduce apart from humans?

[Splodgetastic]

Just that - are there any and what is their role? I know there are insects and whale species who go through menopause and have roles such as guarding the colony, helping younger females and showing where food is, but are there species who do not mate or do not reproduce in all cases? Was thinking about it as I approach menopause as a childless woman (and I’m not going to justify being on Mumsnet!) and Google came up with no answer.

Dogs and wolves commonly have phantom pregnancies and lactate at around the time they would have given birth if they had got pregnant during their last season

One theory is that all females roughly synchronise their seasons but only the alpha is allowed to mate and therefore get pregnant

When the alpha gives birth, all the betas start lactating so can help feed the litter to allow the alpha to go back our hunting

Human females have been living past the menopause for millennia.

I vaguely remember (which is shorthand for CBA to google ) from a QI that the menopause is almost unique to humans ? Killer whales being the only other mammal known to experience it ?

On a related note, I can't remember his name (maybe Steve Jones ....) but a scientist on "The Infinite Monkey Cage" suggested that if we could progressively arrange for women to give birth later and later and later in life, then human lifespan would (have to) increase to match.