I argue that the mother has mastery over the fetus, yes.
Yes, a woman has mastery over the fetus within her, but it is unethical for her to ask a doctor to destroy it if she and the human embryo are in homeostasis.
Ethical doctors are not here to destroy a distinct individual at any stage of existence. Not on a woman’s orders, not on a supervisor’s orders, and not on a rogue leader’s orders.
During this century medical researchers will develop an artificial womb for the products of conception to grow in until a fetus reaches viability. This could very well happen within the next 10 years.
How will humanity ethically treat the fetus in natural and artificial settings? How will humanity legally treat the fetus in both settings?
Medical ethics is already struggling with the ethical debate of extending the Day 14 Rule to Day 28 for human embryos in a lab setting.
If a way to keep a fetus alive in the lab until week 24 gestational age occurred tomorrow, the human race would certainly have a major ethical dilemma on its hands concerning such a fetus.
Elective abortion has set precedence for a doctor to legally (and ethically) the take the tools of medicine to destroy a healthy fetus in its natural environment in the name of “choice”.
Yet, a doctor in a lab setting is expected to end research and destroy a human embryo by Day 14 post-fertilization (before it develops its primitive streak (aka a distinct individual) at the start of gastrulation) or face scrutiny as an unethical researcher.
Those are two very different, hypocritical approaches for medicine to take.
If the human embryo is a distinct individual in a lab environment as gastrulation commences, then a human embryo is a distinct individual
in utero inside the woman as gastrulation commences.
Human individuals have human rights.
What gives a woman the right to bodily autonomy as a human being, gives the human embryo its right to autonomy as a human being. Both have a right to be let alone. It’s not the place of medicine to destroy, experiment on, or manipulate one for the sake of the other, if both are in homeostasis.
In the future, medicine will not be able to maintain ethical practices toward the embryo in a lab environment because law will say that
location doesn’t make a difference when it comes to the products of conception. If it can be manipulated in one environment, it can be manipulated in others.
In the practice of medicine,
first, do no harm.
Do good.