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The replacement fertility rate is 2.1 births per female for most developed countries (2.1 in the United Kingdom, for example), but can be as high as 3.5 in undeveloped countries because of higher mortality rates, especially child mortality. [11]
3% of newborns (US) [ 8 ] Deaths. 628,000 (2015) [ 9 ] A birth defect[ a ] is an abnormal condition that is present at birth, regardless of its cause. [ 2 ] Birth defects may result in disabilities that may be physical, intellectual, or developmental. [ 2 ] The disabilities can range from mild to severe. [ 6 ]
Crude birth rate refers to the number of births over a given period divided by the person-years lived by the population over that period. It is expressed as number of births per 1,000 population. The article lists 233 countries and territories in crude birth rate. The first list is provided by Population Reference Bureau. [1]
Birth rate, also known as natality, is the total number of live human births per 1,000 population for a given period divided by the length of the period in years. [ 1 ] The number of live births is normally taken from a universal registration system for births; population counts from a census, and estimation through specialized demographic ...
A cleft lip contains an opening in the upper lip that may extend into the nose. [1] The opening may be on one side, both sides, or in the middle. [1] A cleft palate occurs when the palate (the roof of the mouth) contains an opening into the nose. [1] The term orofacial cleft refers to either condition or to both occurring together.
The mean age at childbearing indicates the age of a woman at their childbearing events, if women were subject throughout their lives to the age-specific fertility rates observed in that given year. [1] In countries with very high fertility rates women can have their first child at a much younger age than the mean age at childbearing.
Specialty. Dermatology. Albinism is a congenital condition characterized in humans by the partial or complete absence of pigment in the skin, hair and eyes. Albinism is associated with a number of vision defects, such as photophobia, nystagmus, and amblyopia. Lack of skin pigmentation makes for more susceptibility to sunburn and skin cancers.
This is a list of countries showing past fertility rate, ranging from 1950 to 2015 in five-year periods, as estimated by the 2017 revision of the World Population Prospects database by the United Nations Population Division. The fertility rate equals the expected number of children born per woman in her child-bearing years.