In this paper we analyze the distribution of fertility rates across the world using parametric mixture models. We demonstrate the existence of twin peaks and the division of the world’s countries in two distinct components: a high-fertility regime and a low fertility regime. Whereas the significance of twin peaks vanishes over time, the two fertility regimes continue to exists over the whole ob...

Status of women is the mirror of cultural and socio – economic development of our country. Women’s status and fertility are interrelated. Various factorsenvironmental, socioeconomic, biological, psychological or cultural factors affect fertility. There is a positive correlation between women’s status and their fertility. Educated women have low birth rate in comparison to uneducated women. The ...

Most work on the human fertility transition has focused on declines in mean fertility. However, understanding changes in the variance of reproductive outcomes can be equally important for evolutionary questions about the heritability of fertility, individual determinants of fertility and changing patterns of reproductive skew. Here, we document how variance in completed fertility among women (4...

It has been argued that Scotland faces population ageing and decline that will have potentially serious economic and social consequences, and that the origin of these process lie in its low and declining fertility rates. This paper argues that low fertility is not the problem it is purported to be, and that pro-natalism is both undesirable and unnecessary. It suggests that low fertility and pop...

Objective: To compare fertility in India to both low-to-middle-income and high-income countries (LMICs HICs) describe the patterns that have accompanied India’s transition low fertility.

Male fertility, the ability of sperm to fertilize and activate the egg and support early embryogenesis, is vital for mammalian reproduction. Despite producing adequate numbers of sperm with normal motility and morphology, some males suffer from low fertility whose molecular mechanisms are not known. The objective was to determine apoptosis in sperm from high and low fertility bulls and its rela...

In this paper we conduct descriptive aggregate analyses to revisit the relationship of low and lowest-low period fertility to cohort fertility and key fertility-related behaviour such as leaving the parental home, marriage, and women's labour force participation. Our analyses show that the cross-country correlations in Europe between total fertility and the total first marriage rate, the propor...

Nearly half of the world's population in 2000 lived in countries with fertility rates at or below replacement level, and nearly all countries will reach low fertility levels in the next two decades. Concerns about low fertility, fertility that is well below replacement, are widespread. But there are both persistent rationales for having children and institutional adjustments that can make the w...

Soil type and fertility level influence straw carbon dynamics in the agroecosystems. However, there is a limited understanding of the dynamic processes of straw-derived and soil-derived carbon and the influence of the addition of straw carbon on soil-derived organic carbon in different soils associated with different fertility levels. In this study, we applied the in-situ carborundum tube metho...