There are many parents of children who remained vegan successfully during pregnancy:
https://www.vrg.org/nutrition/veganpregnancy.php
I do not fail to recognise what is called 'the cycle of life' and other related concepts. Death is not natural, it is the result of the ending of vibration in beings, caused ultimately by their denials and loss of personal power. Power that originated in the will that expresses as emotions. The fact that beings began eating each other so long ago is not proof that this is normal, correct or beneficial.