estimation of fetal maturity

Apr 16th, 2015
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ESTIMATION OF FETAL MATURITY Naegele's rule - Subtract 3 from the month of the LNMP, and add 7 to the first day of the LNMP Normal Pregnancy Lasts (calculated from last normal menstrual period (LMNP))- 280 days - 40 weeks- 9 calendar months- 10 lunar months (28 days) Uterine size/fundal height (see notes above)Quickening (see notes above)Fetal heart tones (see notes above)Fetal weight - Estimation of fetal weight is important when the physician must decide whether to;- allow delivery to proceed as a natural event- induce labor- use tocolytic agents- perform cesarean sectionJohnson's formula for estimation of fetal weight in vertex presentations - Fetal weight (in grams) = fh (in centimeters) - n x 155n = 12 if vertex is above ischial spinesn = 11 if vertex is below ischial spinesfh = fundal height (measured from the pubic symphysis)If the patient weighs more than 91 k

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