Not necessarily.
Do you think women in UK already feel threatened and criminalised when they miscarry?
We have very similar laws here to those under which this case was brought, and a woman can be prosecuted for leaving a live-born baby to die by asphyxiation.
But of course, it doesn't happen. And no-one worries it will. Because unless there was a level of evidence that leads DPP to conclude there is a reasonable chance would satisfy a jury of criminal intention, there will be no prosecution.
As pointed out above, her actions around an abortifacient drugs, outside the provisions for legal abortion, are utterly different from a spontaneous miscarriage.