When are the following determined? sex of the baby - conception blood type - conception unique DNA - conception heart beat - 18 days brain waves - 42 days fingerprints - 84 days spontaneous movement (independent of mother) - 84 days look at the picture of the baby holding the finger of her father before being fully born - it's on MSN right now. Interestingly, many comments about how special and beautiful the moment and baby (which I agree with), but as soon as someone comments on the obvious contradiction (since the baby is not fully emerged from the birth canal, our nation considers the baby a non-person with no rights) many "don't likes" are registered. why?