The purpose of this thesis is to provide an overview of the current abortion debate. The introduction argues that only three topics are relevant to abortion discussion namely personhood, potentiality and rights. There are three possible decisions on the nature of the foetus' moral status: a) it is a person b) it is not a person c) the matter is non-decidable. Chapter 1 examines the argument that personhood and humanity are equivalent concepts. It rejects this conclusion. Personhood is a normative concept whilst humanity is a biological one. Thus the foetus' humanity does not automatically entitle it to rights. Rights are ascribed to persons. What requires to be clarified is the criterion of personhood, that is, those qualities which qu...