You have a great point. At 4 months in an adult woman, there is some outward physical change, but not a significant one. As it proceeds, organs move, the hips change shape, and nothing works quite the way it did before. In a 9 year old, the changes wrought would be phenomenal, and likely life threatening and visible to all(except for a committee of politically appointed reviewing hacks makes a tepid recommendation to the church and government).
Don't kid yourself - for the true believers, once someone is raped, there should be no D&Cs as part of the rape kit, no RU-486, nothing, because that might disturb the pregnancy that might be taking place.
Do you really think that your citing a case representative of less than .0001% of abortions somehow invalidates the SCOTUS decision regarding the efficacy of RICO and the Hobbs Act as regards pro life demonstrations?