Embryos and fetuses are not constitutional persons. The Constitution mandates a Census every decade of "all persons in the US." Women have been included in every Census. No embryo or fetus was ever included because there has to be an "actual Enumeration," not a projected count. If you can't directly see, hear, touch, or feel one, you can make a mistake. Indirect evidence is not good.
Not all women have regular periods and some missed periods are for other reasons.
Morning sickness only affects a third of pregnant women.
In a false pregnancy, when there is no embryo or fetus, a woman can have a missed period, morning sickness, bodily thickening, and feeling of fetal movement.
A pregnancy test cannot tell the difference between:
a healthy pregnancy
a molar pregnancy where there is embryonic and placental tissue but no embryo
an ectopic pregnancy, which can't come to term and always threatens a woman's life
the number of embryos
A sonogram can show one embryo instead of two or three
Some double embryos become a single one
And, when conjoined twins are born, there can be two functional heads, i.e., two persons for one body,
or one non-functional head and one functional head, i.e., one person for one body
No one could count embryos or fetuses with even a probable accuracy until about 30 years ago and it's still "projected."
So at the time of the 14th Amendment, that amendment's due process clause did in fact apply to women, who were persons, and did not apply to embryos or fetuses, who weren't.
An individual woman has rights to life, liberty, and property. At the time of the 14th Amendment, married women did not have the property right, etc., being under coverture, but females who were marriageable but unmarried were adults - and as daughters and widows could inherit and own property, make contracts, run businesses, etc.
John Locke made it clear when he first used the phrase "life, liberty, and property" that "liberty" included enjoyment of the body, its health, limbs, etc.
Abortion is safer than late pregnancy and childbirth and can prevent health problems.
'Nuf said.