stylistic:tone
Fertility and family life

The total fertility rate (TFR) – the average number of children born to a woman over her lifetime – differs significantly between different regions of the world. In 2016, the highest estimated TFR was in Niger (6.62 children born per woman) and the lowest in Singapore (0.82 children/woman). While most Sub-Saharan African countries have a high TFR, which creates problems due to lack of resources and contributes to overpopulation, most Western countries currently experience a sub replacement fertility rate which may lead to population ageing and population decline.

In many parts of the world, there has been a change in family structure over the past few decades. For instance, in the West, there has been a trend of moving away from living arrangements that include the extended family to those which only consist of the nuclear family. There has also been a trend to move from marital fertility to non-marital fertility. Children born outside marriage may be born to cohabiting couples or to single women. While births outside marriage are common and fully accepted in some parts of the world, in other places they are highly stigmatized, with unmarried mothers facing ostracism, including violence from family members, and in extreme cases even honor killings. In addition, sex outside marriage remains illegal in many countries (such as Saudi Arabia, Pakistan, Afghanistan, Iran, Kuwait, Maldives, Morocco, Oman, Mauritania, United Arab Emirates, Sudan, and Yemen).

The social role of the mother differs between cultures. In many parts of the world, women with dependent children are expected to stay at home and dedicate all their energy to child raising, while in other places mothers most often return to paid work (see working mother and stay-at-home mother).