Ultrasound diagnosis of early pregnancy and cutoff measurements of early demise

Dr Amira El AzabLecturer of radiology

Al Azhar University

No ultrasound findings

U/S gestational age up to:  4  wks  3 dys.

U/S gestational age from 4  wks  3 dys.up to:  5  wks  0 dys.

possible small gestational sac possible intradecidual sac sign (IDSS) possible double decidual sac sign (DDSS)

U/S gestational age from 4  wks  3 dys.up to:  5  wks  0 dys.

possible small gestational sac possible intradecidual sac sign (IDSS) possible double decidual sac sign (DDSS)

U/S gestational age from 4  wks  3 dys.up to:  5  wks  0 dys.

possible small gestational sacpossible intradecidual sac sign (IDSS)possible intradecidual sac sign (IDSS)

U/S gestational age from 4  wks  3 dys.up to:  5  wks  0 dys.possible small gestational sacpossible intradecidual sac sign (IDSS)possible intradecidual sac sign (IDSS)

U/S gestational age from 5  wks  1 dys.up to:  5  wks  5 dys.

gestational sac should be visible by this time

U/S gestational age from 5  wks  5 dys.up to:  6  wks  0 dys.

yolk sac should be visible by this timegestational sac should be ~6 mm in diameterdouble bleb sign

yolk sac should be visible by this timegestational sac should be ~6 mm in diameterdouble bleb sign

U/S gestational age from 5  wks  5 dys.up to:  6  wks  0 dys.

U/S gestational age from  6  wks  0 dys.

fetal pole may be identifiable on endovaginal ultrasound (1-2 mm)fetal heart rate (FHR) should be ~100-115 bpmgestational sac should be ~10 mm in diameter

U/S gestational age at:  6  wks  5 dys.

crown rump length (CRL) should be ~5 mm

U/S gestational age from 7wks  up to:  8 wks.

CRL is between 11-16 mmcephalad and caudal poles can be identified

U/S gestational age from 8wks  up to:  9 wks.

CRL is between 17-23 mmlimb buds appearhead can be seen as separate from the body

U/S gestational age from 9wks  up to:  10 wks.

CRL is between 23-32 mmfetal heart rate 170-180 bpmfetal movement can be seena round hypoechoic structure in the fetal brain represents a developing embryonic/fetal rhombencephalonnuchal translucency may begin to be seen

Transvaginal/endovaginal (TV/EV) scanning

intradecidual sac sign (IDSS): early sign on a TV scanwhen the MSD measures 25 mm, an embryo must be visiblewhen the CRL measures >7 mm, an embryo must show cardiac activityan embryo should be seen <=14 days after a scan with a gestational sac without a yolk sacan embryo should be seen <=11 days after a scan with a gestational sac and a yolk sac

The Embryo Is Always Right

Thank you