All state and federal unborn victims of crime bills in America as of April 2021 are unprincipled. Sadly they reinforce the so-called "legitimate" intentional killing of unborn children. This is unnecessary. It will take moral leadership to change the status quo.
Colorado Right To Life repeatedly introduced in the state legislature principled fetal crimes bills. When the single-sentence bill (see the text just below) passed the House of Representatives the Democrat-controlled Senate voted it down. (In 2011 a compromised anti-personhood, abortion-affirming bill was introduced by Republicans but then killed by widespread pro-life opposition led by CRTL.)
Principled UVCA: Working with a county prosecutor, Colorado Right To Life developed this wording (that passed the House), and now American RTL recommends to all states legislation based upon this model:
"If the commission of any crime codified in Title 18 [criminal code] or Title 42 [driving drunk, reckless, etc.] of the Colorado Revised Statutes is the proximate cause of death or injury to an unborn member of the species Homo sapiens, the respective homicide and assault charges for that death or injury may be brought contemporaneously with the underlying charges."