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  2. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    For example, if there is a gestational age based on the beginning of the last menstrual period of 9.0 weeks, and a first-trimester obstetric ultrasonography gives an estimated gestational age of 10.0 weeks (with a 2 SD variability of ±8% of the estimate, thereby giving a variability of ±0.8 weeks), the difference of 1.0 weeks between the ...

  3. Bayley Scales of Infant Development - Wikipedia

    en.wikipedia.org/wiki/Bayley_Scales_of_Infant...

    The Bayley Scales of Infant and Toddler Development (version 4 was released September 2019) is a standard series of measurements originally developed by psychologist Nancy Bayley used primarily to assess the development of infants and toddlers, ages 1–42 months. [1] This measure consists of a series of developmental play tasks and takes ...

  4. Live birth (human) - Wikipedia

    en.wikipedia.org/wiki/Live_birth_(human)

    A preterm baby is born before the gestational age of 37 weeks. A pregnancy that lasts 41 weeks up to 42 weeks is called late-term and a pregnancy longer than 42 weeks is called post-term . [10] The general consensus is that a fetus is viable at 24 weeks, however, a live birth may occur earlier in gestation with the assistance from neonatal ...

  5. Relative age effect - Wikipedia

    en.wikipedia.org/wiki/Relative_age_effect

    The distribution of births according to month in the general population. The term relative age effect (RAE), also known as birthdate effect or birth date effect, is used to describe a bias, evident in the upper echelons of youth sport and academia, where participation is higher amongst those born earlier in the relevant selection period (and lower for those born later in the selection period ...

  6. en.wikipedia.org

    en.wikipedia.org/wiki/Baby-birth-date-predictor

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  7. Birth weight - Wikipedia

    en.wikipedia.org/wiki/Birth_weight

    Baby weighed as appropriate for gestational age. Birth weight is the body weight of a baby at their birth. [1] The average birth weight in babies of European and African descent is 3.5 kilograms (7.7 lb), with the normative range between 2.5 and 4.0 kilograms (5.5 and 8.8 lb). [2]

  8. 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 ...

  9. Gravidity and parity - Wikipedia

    en.wikipedia.org/wiki/Gravidity_and_parity

    Females having their first birth after the age of 35 years had a 40% increased risk compared to those with a first birth before the age of 20 years. Parity in biology. In agriculture, parity in biology is a factor in productivity in domestic animals kept for milk production. Animals that have given birth once are described as "primiparous ...

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