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.

We use data from the 1981 and 1991 censuses of India to examine (a) sex ratios among infants aged under 2, (b) child mortality (q5) by sex, and (c) estimated period sex ratios at birth (SRB) calculated by reverse survival methods, to see whether bias against female children pers

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