Serial
Biometric Growth Pattern.
1.
Mat Wt gain
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First trimester at least 1 kg. From 32
W to 36 W =27 Gm /day. &
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Second tri=5 Kg. Usual wt gain is 0.5 Kg/week, per day 24 Gm
F. Wt gain 36-40 weeks.
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Total gain by 3rd Tri=11
Kg. Usual wt gain in > 2Kg /month.
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2.
SFH
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If clinically SFH lags 4 cm then
possible FGR.
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Apply Johnsons Formula.
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3.
Mat AC
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Standard rise of AC of mother 2.5 cm
/weekly after 30 week.
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At term mat AC is inches means gest
age in weeks.
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4.Clinical assess of LA
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Apply
Johnsons Formula & in calculation of foetal wt.:- Ht of fundus in Cm -12 ÷ 12 ×
155 + wt of foetus as calculated clinically. This is true if vertex is above I
spines.
Relevance of measuring Maternal AC in unbooked
cases where pregnancy dating has not been done due to late attendance?:- upto
20-30 weeks:- Ht in cm is equal to week in gestation. After 20 weeks of gest.
The SFH should grow by 1 cm/week. If less then close follow up mandated. It can
pick up as many as 40% of FGR cases by clinical means alone. If seriously
measured then such clinical serial biometry can pick up as many as 70-85%
specific in the of FGR cases. , 96% specific.
Relevance of measuring SFH at 32-36 weeks: - If
the pregnancy is well dated & later if one notices that there is growth
lag> 3 cm during the gest period of 32 to 36 Weeks-> if Fundal lengths
less 3 cm then FGR suspected on clinical biometry. Relevance of measuring SFH
at 36 weeks & later: - If there is well dated pregnancy then if Fundal lengths
less 2 cm then F
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