Liver diseases in pregnancy: Diseases unique to pregnancy

Table 2 Hemolysis, elevated liver function tests, and low platelet counts syndrome diagnostic criteria

HELLP class	Tennessee classification	Mississippi classification
1	Platelets ≤ 100 × 109/L	Platelets ≤ 50 × 109/L
	AST ≥ 70 IU/L	AST or ALT ≥ 70 IU/L
	LDH ≥ 600 IU/L	LDH ≥ 600 IU/L
2		Platelets ≤ 100 × 109/L, ≥ 50 × 109/L
		AST or ALT ≥ 70 IU/L
		LDH ≥ 600 IU/L
3		Platelets ≤ 150 × 109/L, ≥ 100 × 109/L
		AST or ALT ≥ 40 IU/L
		LDH ≥ 600 IU/L

AST: Aspartate aminotransferase; Source: Haram et al. BMC Pregnancy and Childbirth 2009 9:8 doi:10.1186/1471-2393-9-8; ALT: Alanine aminotransferase; HELLP: Hemolysis, elevated liver function tests, and low platelet counts; LDH: Lactate dehydrogenase.