Many “contraceptive” pills are NOT contraceptives. They are, strictly speaking, abortifacients - they allow the tiny human to be conceived but prevent his/her implantation.
Just as a side note, the so-called front line of the pro-life movement, the Catholic Church, on any given Sunday has pews filled with contraception-embracing congregations, (pew research says 78% of American Catholics accept “contraception”) many of which, unwittingly or otherwise have been aborting their own children the last sixty years.