Planned Parenthood Advocates in Missouri A project of: ADVOCATES of Planned Parenthood of the St. Louis Region and Southwest Missouri Planned Parenthood Great Plains Votes Planned Parenthood of the St. Louis Region and Southwest Missouri Planned Parenthood Great Plains Planned Parenthood has been a trusted health care provider for over 90 years. We know first hand that family planning is critical to the health and well-being of women and families. That’s why Planned Parenthood is at the forefront of the reproductive rights movement.