ABSTRACT This article deals with a cluster of moral problems raised by the new techniques of human fertilisation. It is concerned primarily with the putative rights of embryos brought into being as a by‐product of the practice of in vitro fertilisation. In this connection it investigates the basis for the ascription of rights to entities and asserts the view that consciousness is a pre‐requisite for the possession of rights. It draws attention to the speciesism implicit in attitudes of some of (...) those who have contributed to the debate. It also examines other issues briefly, raising, for example, the question whether children by AID (or by in vitro fertilisation by donor) must be denied access to information about their genetic fathers; and looking at objections to the new techniques based on the so‐called unnaturalness of the procedures involved. (shrink)