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What is Diabetic embryopathy and explain in detail?
Diabetic embryopathy refers to congenital maldevelopments that are linked to maternal diabetes. Prenatal exposure to hyperglycemia can result in spontaneous abortions, perinatal mortality, and malformations. Type 1 and Type 2 diabetic pregnancies both increase the risk of diabetes induced teratogenicity. The rate of congenital malformations is similar in Type 1 and 2 mothers because of increased adiposity and the age of women with type 2 diabetes. Genetic predisposition and different environmental factors both play a significant role in the development of diabetic embryopathy. Metabolic dysfunction in pregnant mothers also increases the risk of fetal malformations.

Risk factors
Women with pregestational diabetes are at the highest risk for fetal malformations. The risk of congenital malformations in pregestational type 1 diabetes is directly correlated with glucose and glycohemoglobin levels in the blood. It is also inversely related to the gestational age at first exposure. The comorbidities associated with pregestational type 2 diabetes include advanced maternal age, lipid preroxidation and obesity. Overweight women (BMI ≥ 25) who develop gestational diabetes have an intermediate risk for malformations. Pregnant women who have gestational diabetes but dont have prediabetic markers experience perinatal outcomes that are similar to women without diabetes.

Gestational consequences
Malformations
Type 1 diabetes in pregnant women can result in malformations that affect the musculoskeletal , urogenital, and central nervous systems. Most of these malformations occur within the first 4 weeks of gestation. Caudal dysgenesis is one of the most strongly associated diseases to diabetes. This malformation has the highest risk for diabetic embryopathy. Infants from diabetic mothers usually have several blastogenic malformations. Diabetic embryopathy is therefore an etiological subgroup of defects of blastogenesis that present different monotopic and polytopic developmental defects.

Abortion and perinatal deaths
Diabetic embryopathy may result in early or late spontaneous abortion and stillbirth. In maternal diabetes, 90% of pregnancy losses happen in the first trimester due to oxidative stress. Diabetic embryopathy abortions in the second-trimester are most likely due to severe birth defect, maternal metabolic derangement, placental insufficiency and fetal hypoxia due to membrane rupture.

Pathogenesis
The development of birth defects associated with maternal hyperglycemia is multi-factorial