If ????? ?? ???? ??, why is the fetus Nogaiah to the din of Rodef at all?
Many have asked this kashya. See end of ???? ?????? ?”? ????? ?”?. It doesn’t change what the Gemara and Rambam say.
http://hebrewbooks.org/pdfpager.aspx?req=1447&st=&pgnum=439&hilite=