Here I go again with yet another list of definitions from various medical sources refuting the unscientific claim that a fetus is not a baby/child/human:
ACOG
Fetus: a BABY growing in the woman's uterus.
http://www.acog.org/~/media/For%20Patients/faq060.pdf?dmc=1&ts=20120519T1251211855
Cincinnati Children's Hospital Medical Center
Fetus: A developing HUMAN, usually defined as three months after conception to birth. This stage of development follows the embryo or embryonic stage.
http://www.cincinnatichildrens.org/service/f/fetal-care/patients/glossary/Johns Hopkins Medicine
Fetus: an unborn BABY from the eighth week after fertilization until delivery.
http://www.hopkinsmedicine.org/healthlibrary/conditions/adult/pregnancy_and_childbirth/glossary_-_pregnancy_and_childbirth_85,P01219/
University Center for Fetal Medicine (University of Mississippi)
Fetus: an unborn BABY after the eighth week post fertilization.
http://www.umhc.com/Health_Care_Services/Womens_Care/Adult/Fetal_Medicine/Fetal_Medicine_Glossary.aspx
Yale Medical Group
Fetus: an unborn BABY from the eighth week after fertilization until birth.
http://www.yalemedicalgroup.org/stw/Page.asp?PageID=STW023795
Lastly, please watch this amazing video from a Yale scientist, Alexander Tsiaras, Chief of Scientific Visualization, Department of Medicine, Yale University
http://www.ted.com/talks/alexander_tsiaras_conception_to_birth_visualized.html
Now to those insisting that these were written so lay people can understand them, I say, the authors would not have used the terms BABY or HUMAN if they were inaccurate. They would have restricted the use of the word BABY to refer to newborns or neonates and likewise, the word HUMAN to refer to those already born depending on whatever criteria for personhood one has, whether age, ethnicity, etc.