Some single women choose their mothers to be their birth partner.
You may find some discouragement with this idea, but only you know who will best give you the unconditional support at a time when you truly need it. If you've chosen to become a single mother, hopefully you are not the kind of person who needs to have someone hold her hand through every trial and tribulation. But childbirth classes take time and even labor can go on for days. Rarely are non-relatives allowed off from work for birth partnering. It helps a lot if your birth partner can make use of a flexible schedule.