From mkg/l in international units

[OlgaV]

The doctor, prompt, please, urgently how it is possible to translate or transfer norms or rates of Progesteronum from mkg/l in international units? At me 6 weeks of pregnancy, Progesteronum 37, 52 (19 55) mkg/l and it on support utrozhestnom. I try to find norms or rates for 1 trimester, but all of them in nmol/l.
Thanks