The Start of human life  

 Life has been determined by science the zygote is when human development begins, this is the start of a person.  Any of you that believe something else are lacking common sense.  A human from the start to the end goes thru changes, from the zygote all the way to death.  In order to make any change a human must already existed.  There is NO point during the development of a human that it could be something else.  Life starts at conception, it's not a dog or cat, it's a human!

Now, if you have some reasonable reason that claims it is different, post it!  But remember if at your point of life starting something already exists, then you point is not the beginning.