No- medical abortions are done with the consent of the women. This women did not give her consent and was purposely give a different drug to harm to her body.
Your reasoning is flawed. She would give her consent as well if she was committing suicide. The difference is intent. If she consented to an abortion, it would be her intention to abort the fetus, not to kill herself. Likewise, his intent was to abort the fetus, not to kill her.
Was it negligent? Sure. Was it assault? Sure. Did he cause harm to her? Yes. But unless you're arguing that it was his intent to kill her, your argument that he attempted to murder her falls apart.