Table 1.

Scoring System for nonviable pregnancies.

	Variable	Numeric score
1	Age
	18< 38>	+1 +3
2	History of ectopic pregancy
	1 2 or more	+2 +3
3	Bleeding	+4
4	History of miscarriage	−1
5	ΒHCG>2000 mIU/ml	−1

The total score may vary between −2 and 10. Total scores between −1 and −2 indicate low risk, scores between 0 and 4 show medium risk and scores ≥5 point to a high risk.