A reasonable person might conclude that. But suppose there is a statistically significant correlation between certain strenuous physical activity and miscarriages within the first eight weeks of pregnancy, and the woman engages in those activities and suffers a miscarriage very early in her pregnancy. The issue then becomes whether a reasonable person would have known or should have known that engaging in that activity is likely to cause serious injury or death to an unborn person a few weeks after conception. At the very least, you have a jury question for an overzealous prosecutor.
I think the legal motive would look for malicious intent, not “risk” or knowing risk unless that activity pretty close to 100% of the time causes harm such as illicit drug use or alcholism.