A fetus is defined as an unborn baby eight weeks after fertilization.
Sources:
- Cleveland Clinic. Fetal Development: Stages of Growth. https://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth (accessed 3. August 2020)
- University of Rochester Medical Center. Anatomy: Fetus in Utero. https://www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=85&contentid=P01189 (accessed 3. August 2020)