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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. Crown-rump length - Wikipedia

    en.wikipedia.org/wiki/Crown-rump_length

    The age from this point in time (conception) is called the fertilization age and is thus 2 weeks shorter than the gestational age. Thus a 6-week gestational age would be a 4-week fertilization age. Some authorities however casually interchange these terms [citation needed] and the reader is advised to be cautious. An average gestational period ...

  4. Timeline of human prenatal development - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_human_prenatal...

    Gestational age: 35 and 0 days until 39 weeks and 6 days old. Embryonic age: Weeks nr 34–38. 33–37 weeks old. The fetus is considered full-term at the end of the 39th week of gestational age. It may be 48 to 53 cm (19 to 21 in) in length. The lanugo is gone except on the upper arms and shoulders. Fingernails extend beyond fingertips.

  5. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    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.

  6. Prenatal nutrition - Wikipedia

    en.wikipedia.org/wiki/Prenatal_nutrition

    If growth defects were observed in the first trimester, then the measurement of the date of last menstrual period becomes quite important since the crown-heel length has become less of a reliable indicator of gestational age. [23] After the 20th week of pregnancy, the mother would need to visit the doctor for the measurement of fundal height ...

  7. Ballard Maturational Assessment - Wikipedia

    en.wikipedia.org/wiki/Ballard_Maturational...

    The scores were then ranged from 5 to 50, with the corresponding gestational ages being 26 weeks and 44 weeks. An increase in the score by 5 increases the age by 2 weeks. The New Ballard Score allows scores of −1 for the criteria, hence making negative scores possible.

  8. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    An embryo is the term for the developing offspring during the first seven weeks following implantation (i.e. ten weeks' gestational age), after which the term fetus is used until birth. [ 5 ] Signs and symptoms of early pregnancy may include missed periods , tender breasts, morning sickness (nausea and vomiting), hunger, implantation bleeding ...

  9. Fetal viability - Wikipedia

    en.wikipedia.org/wiki/Fetal_viability

    The baby's gestational age (number of completed weeks of pregnancy) at the time of birth and the baby's weight (also a measure of growth) influence whether the baby will survive. Another major factor is gender: male infants have a slightly higher risk of dying than female infants, [ 41 ] for which various explanations have been proposed.

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