Variable | Score | ||||
1) Endometrial thickness (a, b, c) | |||||
Thickness a: <7 mm | 1 point, | ||||
b: 7 - 10 mm | 2 points | ||||
c: ≥11 mm | 3 points | ||||
2) Endometrial morphology | |||||
Type A: immature trilaminar endometrium with three distinct zones of | |||||
hyperechoic outer and inner layer and hypo-echoic dark parenchyma* | 2 points | ||||
Type B: preovulatory trilaminar endometrium, with iso-echoic parenchyma* | 3 points | ||||
Type C: over-mature, hyper-echoic endometrium with loss of the three zone structure | 1 point | ||||
3) Pulsatility Index of Uterine Arteries (UAPI) (mean value of both uterine arteries) | |||||
Degree 1: PI: <2 | 2 points | ||||
Degree 2: PI: 2 - 3 | 3 points | ||||
Degree 3: PI: >3 | 1 point | ||||
4) Vascularity of myometrium-vascularisation of endometrium | |||||
Grade 1: vessels detectable only in the outer half of the myometrium | 1 point | ||||
Grade 2: vessels detectable throughout the myometrium | 2 points | ||||
Grade 3: vessels detectable up to the basal membrane of the endometrium or within the endometrium | 3 points | ||||