الفهرس 
Estimation of due dateOnly 14 pages are availabe for public view
 |  | from | 155 |  |  |
| | | from | 155 | | |
Abstract
SUMMARY
Proper evaluation of GA is important in obstetric care. Uncertain GA has been associated with adverse pregnancy outcomes as preterm delivery, post maturity, low birth weight,
perinatal morbidity and mortality due to improper timing for intervention whether early or late.
So adequate management decisions, planning of proper
intervention or therapy and appropriate obstetric care requires
accurate evaluation of GA.
The dating of pregnancy was based on the first day of last
menstrual period (LMP) in a regular 28 days menstrual cycle.
But this method is unreliable in most of cases because most of pregnant women are uncertain of menstrual dates as a result of poor remember, irregular cycles, bleeding in early pregnancy, or hormonal contraceptive use within two months of conception,
and lactating mothers.
The other methods used to estimate gestational age are clinical assessment of the fundal height, and ultrasonographic
fetal biometry.
Clinical examination is not enough in estimating the GA because it may be affected by fetal growth disorders, amniotic fluid volume and maternal obesity.
The sonographic estimation is derived from calculations
based on fetal measurements and serves as an indirect indicator of
GA.