One or more of the premises are vague or ambiguous such that it is not possible to determine whether they are acceptable or not. One or more of the premises depends on an underlying assumption that is either refutable or highly controversial. For the audience to whom the argument is addressed, the premises are not more certain than the conclusion. One or more of the premises presupposes the truth of the conclusion, so the argument begs the question. If a person gives birth to a child, she is responsible for taking care of it.
Responsibilities are something acquired voluntarily.
Of course, some children are born as a result of rape or incest, sexual attacks to which women are involuntarily subjected. I think that is wrong to eat meat, but I do so anyway. All humans are carnivorous. Carnivorous beings eat meat. Yet some human beings are vegetarians.