Making abortion illegal and therefore murder, would be a big step in the right direction and would satisfy me. And, that includes the removal of the "morning after pill".
Miscarriage and manslaughter may only be possible in an extreme circumstance - for example, a women winds up in the emergency room for a drug overdose and has a miscarriage after being pregnant for 3 months. Or, a drunk driver hits a pregnant women, she lives but the baby dies. The drunk driver would be guilty of manslaughter.
So, you are eager to defend a 3 month fetus but a 2 1/2 month fetus not so much.
Those absolute vales are suddenly less absolute.