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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. 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.

  4. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    An estimated due date is given by Naegele's rule. According to the WHO, a preterm birth is defined as "babies born alive before 37 weeks of pregnancy are completed." [20] According to this classification, there are three sub-categories of preterm birth, based on gestational age: extremely preterm (fewer than 28 weeks), very preterm (28 to 32 ...

  5. Wikipedia

    en.wikipedia.org/wiki/Conception-date-based-on...

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  6. Fetal viability - Wikipedia

    en.wikipedia.org/wiki/Fetal_viability

    Fetal viability is the ability of a human fetus to survive outside the uterus. Viability depends upon factors such as birth weight, gestational age, and the availability of advanced medical care. In low-income countries, more than 90% of extremely preterm newborns (less than 28 weeks gestational age) die due to a lack of said medical care; in ...

  7. Dating creation - Wikipedia

    en.wikipedia.org/wiki/Dating_creation

    This date is also found in the historical account The Meadows of Gold (iv.107) written by the 9th-century Arab historian Al-Masudi. Other Arabic, Persian and Muslim sources place Zoroaster around the same date (600 BC). Therefore, if 8,900-9,000 years are added to about 600 BC the date of creation comes to 9600 - 9500 BC. A 12,000 year ...

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