Second-trimester testing for women with diabetes includes a repeat spot urine protein-to-creatinine study in women with elevated value in first trimester, a repeat HbA1C, and capillary blood sugar levels 4-7 times daily.
If preeclampsia is suggested, order the following tests:

24-hour urine collection
Blood urea nitrogen and serum creatinine
Liver function tests
Uric acid
Complete blood cell count
Assessment of fetal well-being with nonstress test, amniotic fluid index, fetal growth and Doppler ultrasonographic examination of the umbilical cord and middle cerebral arter.