Hello. Who had a decreasing level of fetal blood sugar in pregnancy i…

Hello. Who had a decreasing level of fetal blood sugar in pregnancy in the first pregnancy with gestational diabetes from each week it increased before delivery became 38. And in the second pregnancy at 20 weeks it was 35, and after 26 weeks it dropped sharply to 10, and at 29 weeks it completely dropped to 8. Is it not dangerous?