2 religious beliefs in favour of abortion
Many Christians believe that if the pregnancy/birth would kill the mother, then it is better to abort the baby and save the mother, than risk the death of both.
Jesus taught ‘love thy neighbour’ so Christians should always do the most loving thing and consider the quality of life e.g. if the baby would be born with a terrible disease/disability, it may be the compassionate thing to never let it suffer life.