The history of the development of a new scientific or medical technology is a story of science in the making. In this paper we attempt to trace the development of the anti-hCG vaccine over the past 20 years, using controversy as a methodological entry point into the history.

Demographic literature is replete with observations of an inverse relation between certain attributes of modernity and family size (Thompson 1929; Notestein 1945; Coale and Hoover 1958; Leiberman 1980, Srinivasan 1986).

Viewed in retrospect, the development of hormonal methods of fertility control could be broadly divided into three main phases: (i) development of the oral contraceptive 'Pill based on synthetic ovarian steroid hormones; (ii) the demonstration that continuous oral administration of progestins in