This paper is about the interaction between patients and medical techn
ology, and uses ethnographic data drawn from fieldwork in infertility
clinics to question the humanist argument that selves need to be prote
cted from technological objectification to ensure agency and authentic
ity. It argues that objectification is only antithetical to personhood
in specific circumstances. Non-reductive manifestations of objectific
ation make possible a notion of agency not opposed by, but pursued in
objectification. The dependence of science and technology on social, i
ndividual and political factors has been quite extensively worked out
in the science and technology studies literature. The dependence of se
lves on technology has received less attention. In other literatures t
hat take the construction of the person seriously, the role of technol
ogy in that process is typically underemphasized. This paper attempts
to link the initiatives of these literatures by adding an ontological
connection between technology and selves. A notion of 'ontological cho
reography' is developed to describe the processes of forging functiona
l trails of compatibility that create and maintain the referentiality
between things of different kinds -- like persons and reproductive tec
hnologies.