By introducing numerous bills into state and federal legislatures trying to curtail women's access to the most reliable birth control methods available (i.e. the pill, IUD, patch, implant, shot, tubal ligation, Plan B, etc., etc.), Republicans have made it clear that they are NOT in favor of trying to reduce the abortion rate. In fact, their actions WILL INCREASE the abortion rate as many women will go without these most reliable methods of birth control for financial reasons.
If Republicans were actually trying to reduce the number of abortions performed in the U.S. each year, they would be introducing bills which would make birth control MORE available for more women.
As usual, it is the Democrats who are doing more to reduce the abortion rate than Republicans.