A higher blood fat ratio was linked to about twice the odds of diabetes during pregnancy, but it is not a proven prediction tool. That measure is the TG:HDL Ratio. It compares Triglycerides, a type of blood fat, with HDL Cholesterol. A 2026 review combined 23 studies involving more than 180,000 people. It looked at pregnancy outcomes and two blood-based measures. The second measure combined blood fat and blood sugar levels. For the ratio, higher values were linked to 2.02 times the odds of diabetes during pregnancy. They were also linked to 4.38 times the odds of a baby being larger than expected for its stage of pregnancy. These are comparisons between groups, not a person's chance of either outcome. Twice the odds does not necessarily mean twice the risk. The combined blood fat and blood sugar measure showed broader links. Higher values were linked to high blood pressure during pregnancy and early birth, too. Those findings should not be treated as findings about the ratio itself. A link does not prove cause. The review does not show that lowering the ratio prevents pregnancy problems. The authors also say more testing is needed before using these measures to guide care. The summary gives no single cutoff for a high ratio. For BioSocial members, this offers context for tracking—not a pass-or-fail score. Shared bloodwork histories can help members compare notes without assuming the same number means the same outcome. What patterns have you noticed in your ratio before, during, or after pregnancy?