When did Catholics start believing that life started at conception?
Generally, the Jewish religion believe that life begins when the majority of the baby has left the birth canal. Or, that life begins at birth. Also, they are taught that abortion is wrong except when exceptional circumstances - such as the life of the mother being in danger.
Since much of the Catholic teachings come from the Jewish tradition and beliefs, when did the belief that life started at conception begin for Catholics? Is it embodied in the New Testament? Did these teachings occur later? If so, when?
Since the Psalms are part of the Jewish canon, how did Catholics end up with different beliefs?
I have researched each of the answers and their sources. Many of the answers don't really answer the question. Many of these sources are simply opinions of other people. Or the sources claim "facts" that cannot be independently substantiated.
In my research, it appears that the belief that life begins earlier than childbirth dates to Aristotle and is universal among all early Christian teachings - including the Didache.
This appears to be the best forum on the topic:
http://www.chnetwork.org/forums/forum18/1077.html