Abortion Pill Rescue Network (APRN) was credited with saving more than 500 lives, a decade after the pioneering treatment was first used, it was reported in November.
Heartbeat International, the pro-life organisation which took over the APRN earlier in 2018, said another 100 babies are on the way, thanks to the measure.
Abortion pill reversal is a technique which aims to preserve the life of a baby by giving the mother the natural hormone progesterone up to 72 hours after taking mifepristone, the first of two pills required for a chemical abortion.