Romaniuk A
Demography. 1981 May;18(2):157-72.
It has been hypothesized that populations may experience an increase in their natural fertility during the early stages of modernization as a result of the relaxation of various fertility-inhibiting practices and customs prevalent in traditional societies. This article offers evidence of such an increase in natural fertility among Canadian Indians. The main underlying cause is found to be in the massive, almost abrupt, shift from prolonged breastfeeding to bottlefeeding ;which took place prior to the onset of large-scale birth control practices among Canadian Indians.
据推测，在现代化早期，由于传统社会中各种抑制生育的习俗和做法有所放松，人口的自然生育率可能会上升。本文提供了加拿大印第安人自然生育率上升的证据。主要潜在原因是从长期母乳喂养到奶瓶喂养的大规模、几乎突然的转变，这一转变发生在加拿大印第安人开始大规模节育措施之前。
