Tiwari V K, Dwivedi S N
Sankhya Ser B. 1994 Apr;56(1):26-38.
"In this paper, a set of two probability models have been derived to describe the variation in the length of open birth interval of women having given birth to a child during the last 'T' years of their current reproductive age. The first model is derived by assuming the reproduction process as steady-state, the second is obtained by varying the fecundability parameter involved in the first model after the last birth. These models are applied to the three sets of data, one collected from [the Indian] Varanasi-survey, 1969-70 and the other two generated from the data on age-specific fertility rates using the life table technique. The biological parameters such as fecundability and secondary sterility have been estimated using some simple procedure of estimation."
在本文中，已推导出一组两个概率模型，用于描述在当前生育年龄的最后“T”年中生育过一个孩子的女性的开放生育间隔长度的变化。第一个模型是通过假设生殖过程为稳态推导出来的，第二个模型是通过在最后一次生育后改变第一个模型中涉及的受孕能力参数而得到的。这些模型应用于三组数据，一组是从1969 - 1970年[印度]瓦拉纳西调查收集的，另外两组是使用生命表技术从特定年龄生育率数据生成的。诸如受孕能力和继发性不育等生物学参数已通过一些简单的估计程序进行了估计。
