You could have a baby at 30 and die from a heart attack or a road accident five years later, leaving your child without a parent very young.
You could have a baby at 40 and die at the average age of death 80.
You could have a baby at 50 and live to be 95.
Whatever age you die, your child will still have the support of their other parent, extended immediate family, siblings, friends, partner or work colleagues if older. Everyone dies, older new parents are the norm now, and very rarely are children left totally orphaned.
If you have the energy and finance to support a child, I don't think your age matters.
This however comes from a 44 year old sometimes broody woman with two healthy young children already (4 and 6) whose new partner adamantly doesn't want children because he is too old at 44, so I'm probably not being rational, given my baby making days are now over!