Anteverted: Fundus pointing to anterior abdominal wall
Retroverted: Fundus pointing to posterior wall
Endometrial stripe: Measured from thickest echogenic area (from one basal endometrial interface to the other, including canal)
Pre-menopausal:
During menstruation: 2-4mm
Early proliferative phase: 5-7mm
Late proliferative phase: 11mm
Secretory phase: 7-16mm
After D&C or SAB: >5mm
Consider retained POC if thicker
Post-menopausal:
With vaginal bleeding: <5mm
Without vaginal bleeding: <11mm
Pre-menopausal:
During menstruation: 2-4mm
Early proliferative phase: 5-7mm
Late proliferative phase: 11mm
Secretory phase: 7-16mm
After D&C or SAB: >5mm
Consider retained POC if thicker
Post-menopausal:
With vaginal bleeding: <5mm
Without vaginal bleeding: <11mm
During menstruation: 2-4mm
Early proliferative phase: 5-7mm
Late proliferative phase: 11mm
Secretory phase: 7-16mm
After D&C or SAB: >5mm
Consider retained POC if thicker
Consider retained POC if thicker
With vaginal bleeding: <5mm
Without vaginal bleeding: <11mm
Normal thickened endometrial stripe during secretory phase






Normal thin endometrial stripe during menses
Normal thickened endometrial stripe during secretory phase
Normal thin endometrial stripe during menses
Physiologic cysts present
<3 cm diameter
Ovarian follicle or corpus luteum
Typically don't cause complications
<3 cm diameter
Ovarian follicle or corpus luteum
Typically don't cause complications
4-5 weeks
Gestational sac
First sign of early pregnancy, usually seen between 3-5 weeks gestation
"Double decidual sac" sign
Two concentric rings (uterine lining and gestation lining) around anechoic gestational sac)
Highly suggestive of intrauterine pregnancy (before yolk sac or embryo embryo visualized
"Intradecidual sign"
Thickened decidua on one side of uterine cavity surrounding anechoeic sac
Gestational sac
First sign of early pregnancy, usually seen between 3-5 weeks gestation
"Double decidual sac" sign
Two concentric rings (uterine lining and gestation lining) around anechoic gestational sac)
Highly suggestive of intrauterine pregnancy (before yolk sac or embryo embryo visualized
"Intradecidual sign"
Thickened decidua on one side of uterine cavity surrounding anechoeic sac
First sign of early pregnancy, usually seen between 3-5 weeks gestation
Two concentric rings (uterine lining and gestation lining) around anechoic gestational sac)
Highly suggestive of intrauterine pregnancy (before yolk sac or embryo embryo visualized
Thickened decidua on one side of uterine cavity surrounding anechoeic sac
5-6 weeks:
Yolk Sac
Circular (or sometimes as two parallel lines) echogenic structure with thick walls within gestational sac
Definitive evidence of intrauterine pregnancy
Multiple yolk sacs is earliest sign in multiple gestational pregnancy
"Double bleb" sign
Yolk sac and amniotic cavity that look like two bubbles within gestational sac
Yolk Sac
Circular (or sometimes as two parallel lines) echogenic structure with thick walls within gestational sac
Definitive evidence of intrauterine pregnancy
Multiple yolk sacs is earliest sign in multiple gestational pregnancy
"Double bleb" sign
Yolk sac and amniotic cavity that look like two bubbles within gestational sac
Circular (or sometimes as two parallel lines) echogenic structure with thick walls within gestational sac
Definitive evidence of intrauterine pregnancy
Multiple yolk sacs is earliest sign in multiple gestational pregnancy
Yolk sac and amniotic cavity that look like two bubbles within gestational sac
6-7 weeks
Fetal Pole
First visual manifestation of fetus (or "embryo")
Thickening of margin on yolk sac
Cardiac activity present (FHR ~100-115 bpm)
Crown rump length: ~5mm
8-9 weeks
Limb buds appear
Head identifiable
9-10 weeks
FHR ~170-180 bpm
Fetal movement visible
End of embryonic period
Fetal Pole
First visual manifestation of fetus (or "embryo")
Thickening of margin on yolk sac
Cardiac activity present (FHR ~100-115 bpm)
Crown rump length: ~5mm
First visual manifestation of fetus (or "embryo")
Thickening of margin on yolk sac
Limb buds appear
Head identifiable
FHR ~170-180 bpm
Fetal movement visible
End of embryonic period
Double decidual sac sign






Intradecidual sign






Double bleb sign (yolk sac and amniotic cavity)






Fetal pole (Thickening of yolk sac on one side)
Double decidual sac sign
Intradecidual sign
Double bleb sign (yolk sac and amniotic cavity)
Fetal pole (Thickening of yolk sac on one side)
Pelvic ultrasound 
Bladder ultrasound
Ultrasound 
Musculoskeletal ultrasound
FAST exam
Emergency contraception
Renal ultrasound
Urine analysis