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EDC (Expected Date Delivery)

This document provides information on calculating expected date of delivery (EDC) based on last menstrual period (LMP) and determining age of gestation (AOG) in weeks. It also defines terms used in obstetrics including gravidity, parity, abortions, and living children. Signs of pregnancy are classified as quickening/fetal movement (presumptive), ballottement (probable), and melasma (presumptive).

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Donna Mae Bool
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233 views3 pages

EDC (Expected Date Delivery)

This document provides information on calculating expected date of delivery (EDC) based on last menstrual period (LMP) and determining age of gestation (AOG) in weeks. It also defines terms used in obstetrics including gravidity, parity, abortions, and living children. Signs of pregnancy are classified as quickening/fetal movement (presumptive), ballottement (probable), and melasma (presumptive).

Uploaded by

Donna Mae Bool
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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EDC (Expected Date Delivery)

- For LMP between April to December ( - 3 mos + 7 days + 1 year)


- For LMP between January to March (+ 9 mos + 7 days
e.g.
LMP: January 15, 2005
01 15 2005
+9 +7
10 22 2005 (October 22,2005)
LMP: December 16 2004
12 16 2004
-3 +7 +1
9 23 2005 (September 23 2005)
l
AOG (Age of Gestation)
- Number of days since LMP to present day divided by 7
e.g.
A pregnant woman comes to the clinic for an initial prenatal check-up.
Her LMP was December 16 2004. Present day is February 14, 2005
December – 15 (31 days – 16 days)
January – 31
February – 14
60 days / 7 = 8 weeks and 4 days
- Mc Donald’s Rule
o Formula: AOG (months) = Fundic height in cm / 4
e.g. FH of 24 cm
= 24/4
= 6 mos (24weeks)
** For 20 weeks AOG and above: FUNDIC HEIGHT (CM) = AOG (WEEKS)
AOG ANATOMICAL LANDMARK
12 weeks Slightly above the symphysis
pubis
20 weeks Level of the umbilicus
36 weeks Below the xyphoid process
32 and 40 weeks Same level due to lightening on
the 40th week
** For below 20 weeks AOG: = FH (CM) X 8/7
= AOG in weeks
- Bartholomew’s Rule – estimates AOG by the relative position of
the uterus in the abdominal caviry
GPTAL
G Gravidity = Number of total pregnancies
P Preterm Births = preterm deliveries (from viability up to 37
weeks) before 40
T Term Births = term deliveries (full) births (38 weeks or
more) born at 40
P Parity = number of viable pregnancies who are
previously born/ number of viable deliveries
= as the number of times that she has given
birth to a fetus with a gestational age of 24
weeks or more, regardless of whether the
child was born alive or was stillborn.
A Abortions = Abortions
L Living Children = number of living children
M Multiple Preg = twins, triplets are counted as one

L1 HOSPITAL
Quickening/ fetal movement felt by the woman/ presumptive
Ballottement/ When lower uterine segment is tapped on a bimanual
examination, the fetus can be felt to rise against the abdominal wall /
Probable
Melasma/ dark pigment on face/Presumptive

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