Semen is alive, but not considered human life because it only has 23 chromosomes. Same with eggs. A human life has 46 chromosomes. Of course it is more than just how many chromosomes you have or we'd be calling crowned lemur's as human.

It is the union of egg and sperm that creates the magic combination to initiate human life.

So to argue that marching to defend a human life is the same is quite silly. Vegans should then march with pro-life if they care about all life as they claim. However, many vegans are for abortion of human life, but scream its murder to eat chicken eggs or consume milk from a cow or wear leather.

It comes across as silly for a group to scream "fur is murder" but "abortion is not!".