No, it's a case of Planned Parenthood, along with other interests in PP's campaign of racism and genocide, pulling a fast one on gynecologists and innocent women.
You probably learned that pregnancy begins when the sperm meets the egg and the two gametes form one cell, a zygote. And that anything that comes along and keeps said zygote from developing into an embryo, implanting, and sprouting into a screaming baby several months later is ending the pregnancy, whether unintentionally (miscarriage, a.k.a. spontaneous abortion) or intentionally (elective abortion). And for a long time, that's what medical schools taught, too.
But ever since the debate on abortion started being taken seriously and birth control methods that expel an unimplanted baby came along (as well as in vitro fertilization), they decided to start defining pregnancy at implantation rather than fertilization. This allows the goose-stepping fiends at Planned Genocide, and the gynecologists in their pockets, to claim that birth control methods that interfere with implantation don't cause abortion, because according to their determination, the pregnancy hasn't begun yet. Consequently, women everywhere are being fooled into using contraceptive methods that kill their babies instead of merely preventing them from coming into being.