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  2. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    The estimated date of delivery ( EDD ), also known as expected date of confinement, [1] and estimated due date or simply due date, is a term describing the estimated delivery date for a pregnant woman. [2] Normal pregnancies last between 38 and 42 weeks. [3] Children are delivered on their expected due date about 4% of the time.

  3. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    The expected number of people needed until every birthday is achieved is called the Coupon collector's problem. It can be calculated by nH n, where H n is the n th harmonic number. For 365 possible dates (the birthday problem), the answer is 2365. Near matches

  4. Life expectancy - Wikipedia

    en.wikipedia.org/wiki/Life_expectancy

    1) The curtate future lifetime , denoted K (x) {\displaystyle K(x)} , is a discrete random variable representing the remaining lifetime at age x {\displaystyle x} , rounded down to whole years. Life expectancy, more technically called the curtate expected lifetime and denoted e x {\displaystyle \,e_{x}\!} , [a] is the mean of K (x) {\displaystyle K(x)} —that is to say, the expected number of ...

  5. Wikipedia:Age calculation templates - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Age_calculation...

    Dates} {} – works with "fuzzy" or ambiguous dates {{Birth date and age}} – used on most biographical entries {{Birth date and age2}} – calculates age at a specified date {{Birth based on age as of date}} – used when a reference mentions the age of a person as of the date of the reference's publication

  6. Projections of population growth - Wikipedia

    en.wikipedia.org/wiki/Projections_of_population...

    The table below shows that from 2020 to 2050 and beyond to 2100, the bulk of the world's population growth is projected to take place in Africa. Of the additional 1.9 billion people projected between 2020 and 2050, 1.2 billion will be added in Africa, 0.7 billion in Asia and zero in the rest of the world.

  7. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Naegele's rule is a standard way of calculating the due date for a pregnancy when assuming a gestational age of 280 days at childbirth. The rule estimates the expected date of delivery (EDD) by adding a year, subtracting three months, and adding seven days to the origin of gestational age.

  8. Birth–death process - Wikipedia

    en.wikipedia.org/wiki/Birth–death_process

    Birth–death process. The birth–death process (or birth-and-death process) is a special case of continuous-time Markov process where the state transitions are of only two types: "births", which increase the state variable by one and "deaths", which decrease the state by one. It was introduced by William Feller. [1]

  9. Birth rate - Wikipedia

    en.wikipedia.org/wiki/Birth_rate

    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 ...

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