Fortunately, Charity Navigator has some solid information on the efficiency of pro-life charities. Here are a few pro-life groups that received high ratings.
Life Legal Defense Foundation: Provides legal representation to pro-life advocates
CareNet: Faith-based pregnancy center network
Good Counsel: Catholic homeless shelter for pregnant women in New Jersey
Human Life International: Catholic organization fighting abortion worldwide
National Right to Life Educational Trust Fund: Responsible for a variety of pro-life educational programs
Pro-Life Action League: Chicago-based group with a focus on sidewalk counseling
A few notes:
1) Secular Pro-Life cannot be evaluated by Charity Navigator because we are not a registered 501(c)(3) organization. We are registered as a non-profit corporation through the state of Florida. Learn more about our current fundraising project here.
2) There are many prominent pro-life organizations that have 501(c)(3) status, but that Charity Navigator hasn’t gotten around to yet (e.g. Students for Life of America).
3) I have not included multi-issue organizations, such as the Family Research Council and Alliance Defense Fund.