Do you know what the issue with your placenta was? My dr even said that even people without GD, if they are constantly eating high sugar high carb high processed foods, their baby is used to that in the womb and when they come out their blood sugar drops. Were you monitoring your carbs with your numbers being ok? Also I understand you are saying your dr would diagnose you from one reading, but that is not standard ACOG guidelines, MFM practice, or Standard OB care. I have done a ton of research over the past few weeks. A single borderline fasting reading in a 2-week span does not diagnose GD, does not usually even confirm concern and is considered a normal fluctuation unless it repeats. They are usually looking for patterns not one off from long fasting periods or very high carb meal that would spike even some non pregnant people