Deadlier Than the Male intrigue when he comes to visit. The title is a reference to the 1911 Rudyard Kipling poem "The Female of the Species," which includes the line, "The female of the species must be deadlier than the male", and also refers to Sapper's earlier Drummond book, "The Female of the Species". The working title of the film was "The Female of the Species". "Deadlier Than the Male", the song featured in the film`s opening credit sequence, was performed by the Walker Brothers. Filmed in Technicolor and Techniscope, portions of the film were shot in Lerici, La Spezia, Liguria, Italy. A sequel,
Female infanticide in India female or male foeticide respectively. Higher sex ratios than in India have been reported for the last 20 years in China, Pakistan, Vietnam, Azerbaijan, Armenia, Georgia and some Southeast European countries, and attributed in part to female infanticide, among other factors. There is an ongoing debate as to the cause of high sex ratios in the 0–1 and 0–6 age groups in India. The suggested reasons for high birth sex ratio include regional female foeticide using amniocentesis regardless of income or poverty because of patrilineal culture, the under-reporting of female births, smaller family size and selective stopping of family size