You do understand the term "constructive", do you not? Or do you assert that constructively making someone an unwilling, unpaid servant is not making them an unwilling, unpaid servant?
Well, if you mean "constructive" as
2. Law derived by inference; implied by operation of law; not obvious or explicit
then, no, I wasn't aware of this definition for the word until I checked it from a dictionary a couple of minutes ago (like I said, English is my native language so I don't know all nuances of all words).
I don't understand why you included that second sentence in your post. You argued that the mother's body becomes legally private property of the fetus. Being an unwilling unpaid servant has nothing to do with being legally private property. I think that using the 'forced to work' sense of 'slavery' to describe abortion ban is justifiable but a bit on the hyperbole side so I wouldn't use it myself.
But the 'legally considered to be private property' side can't be reasonably justified. Let's examine the constructive "derivations by inference and implications" of this matter:
I said in my post that the defining quality of slavery is that person is legally private property of another. The same dictionary has the following definition for property:
Law the right of possession, use, or disposal of something; ownership
I don't know how things are in other coutries, but around here there are a lot of things that you can with your property: you can sell it, you can rent it, you can use it anyway you want, and as long as you are not breaking any laws about protecting environment you are free to throw it away [unless your is property is "frozen" by a court order because you are involved in litigation about your debts], and after you die your survivors may inherit it.
Now, according to Finnish law (
Laki holhoustoimesta, 1.4.1999/442), a person who is less than 18 years old does not have full property rights. He or she may conduct only "minor and inconsequential" transactions. Instead, the child has a guardian who manages the property. By law the parents of a child have joint guardinship unless a court decides otherwise.
So, if the body of the mother is legal property of the fetus, then the father has 50% of say what the mother does with her body because of the joint guardianship. If she wants to do anything that has any effect on her body, she has to either get the father to approve that or go through courts to get a decision overruling him.
Then there's the question of inheritance. If a person who doesn't have children dies, his or her property goes primarily to the parents (
Perintökaari 5.2.1965/40). So, in the case of a miscarriage the father will inherit a 50% ownership of the mother's body (the rest 50% going to the mother).
These are implications of the mother being legally private property of the fetus. Don't you agree that they are a bit absurd?