From: Coagulation changes during pregnancy and delivery: adjustment of reference ranges for thrombelastography and for some laboratory tests is necessary
Time r
Time k
Alpha angle
Maximal amplitude
Coagulation index
Normal population
4–8
1–4
47–74
55–73
-3 to +3
Pregnant women
2–8
1–3
60–77
64–76
0–5