Table 2.

Cross tabulation of individual criteria with actual fate

Progesterone criterion	Final result at conclusion of follow-up			Total
	Ectopic	IUP	FPUL
Ectopic pregnancy	36	72	12	120
Intrauterine pregnancy	3	60	0	63
Failed pregnancy of unknown location	27	12	66	105
Total	66	144	78	288
hCG ratio criterion
Ectopic pregnancy	48	45	15	108
Intrauterine pregnancy	9	99	0	108
Failed pregnancy of unknown location	9	0	63	72
Total	66	144	78	288
Model M4
Ectopic pregnancy	57	12	6	75
Intrauterine pregnancy	9	129	3	141
Failed pregnancy of unknown location	0	3	69	72
Total	66	144	78	288

^*IUP= Intrauterine pregnancy, FPUL= Failed pregnancy of unknown location, hCG=Human Chorionic Gonadotrophin