By.Lamyaa alluhaydan. 1- Is usually obtained twice during the normal pregnancy: (18-24 weeks), (32-38 weeks). 2- It can be done before 18 weeks:  -to.

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Presentation transcript:

By.Lamyaa alluhaydan

1- Is usually obtained twice during the normal pregnancy: (18-24 weeks), (32-38 weeks). 2- It can be done before 18 weeks:  -to confirm intra-uterine pregnancy.  -estimation of G.A.  -exclude abnormal pregnancy (molar or ectopic ).  -multiple pregnancy.

QUSTION ALWAYS SHOULD BE ASKED TO THE PREGNANCY WOMEN BEFROE SCANNING: - LMP. - any cardiac problems. - any previous abnormal baby. - bleeding? - any abnormal pain ? - medication ?? - diabetic ?? SCANNING : -Transvaginal : for early pregnancy on the first 9 wk -Transabdomenal.

GESTATIONAL SAC : -its usually visualized from 31 days (4+3 wks) =(2-3 mm)or (5+3 wks). -it will appear as circle area surrounding by thick bright ring at fundal area. -it grow approx. (1mm/day) -at (8 weeks) amniotic cavity expands rapidly. -at the end of the first trimester, the amniotic and chorionic membrane becomes fused.

YOLK SAC: -appear as circle mass with the G.S. -it can be identified at (35 days). -it grow slowly until reach a maximum of (6 mm)at (10 wks). -the identification of the yolk sac will be very difficult after (12 wks).

EMBRYO: -(4-9) wks (embryo). -(10-40) wks (fetus ). -it can be visualized from (5 wks),on this stage CROWN-RUMP- LENGTH (CRL) can be measured. -the embryo grow (1 mm/day ) -cardiac activity (heart rate ) seen (6-9 wks ) -about ( 9 wks ) placenta can be seen -at ( 8 wks ) upper + lower lumb can be seen more clearly.

NUCHAL TRANSLUCENCY (NT): Seen between ( ) weeks.

MULTIPLE PREGANCY:

ECTOPIC PREGNANCY

Molar pregnancy :

-it called ( routine anomaly scan ) (18-24 wks ). -optimal time to examine fetal heart at (23-24 wks). -fetal anatomy,placenta,amount of amniotic volume,fetal movement,measurements,ovary,uterus, both adnexa.

1- Biparital diameter (BPD) 2- Head circumference (HC) 

3- Abdominal circumference (AC)

4- Femoral length(FL)

5- FETAL POSITION:(cephalic-breach) 6- PLACENA SITE