Related Experiment Video
Updated: Aug 9, 2026

Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model
Published on: April 7, 2023
The causes of stalling fertility transitions
1Policy Research Division, Population Council.
Abstract:
An examination of fertility trends in countries with multiple DHS surveys found that in the 1990s fertility stalled in midtransition in seven countries: Bangladesh, Colombia, Dominican Republic, Ghana, Kenya, Peru, and Turkey. In each of these countries fertility was high (more than six births per woman) in the 1950s and declined to fewer than five births per woman in the early or mid-1990s, before stalling. The level of stalling varied from 4.7 births per woman in Kenya to 2.5 births per woman in Turkey. An analysis of trends in the determinants of fertility revealed a systematic pattern of leveling off or near leveling in a number of determinants, including contraceptive use, the demand for contraception, and number of wanted births. The stalling countries did not experience significant increases in unwanted births or in the unmet need for contraception during the late 1990s, and program effort scores improved slightly, except in the Dominican Republic. These findings suggest no major deterioration in contraceptive access during the stall, but levels of unmet need and unwanted births are relatively high, and improvements in access to family planning methods would, therefore, be desirable. No significant link was found between the presence of a stall and trends in socioeconomic development, but at the onset of the stall the level of fertility was low relative to the level of development in all but one of the stalling countries.
More Related Videos
Related Concept Videos
Infertility in Females
Endometriosis, a condition characterized by abnormal growth of endometrial...
Infertility in Males
Nondisjunction
Understanding Species and Reproductive Barriers
Oogenesis
Oogenesis
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...

