In which types of diabetes do congenital anomalies occur?
Congenital anomalies occur in T1DM (Type 1 Diabetes Mellitus) and T2DM (Type 2 Diabetes Mellitus), but not in GDM (Gestational Diabetes Mellitus).
List some types of congenital anomalies associated with hyperglycemia.
- Cardiac anomalies (e.g., ventricular septal defect)
- Neural tube defects (NTD)
- Genitourinary anomalies (e.g., cystic kidneys)
- Gastrointestinal anomalies (e.g., anal atresia)
- Musculoskeletal anomalies (e.g., sacral agenesis)
True or False: Pregnancies complicated by GDM manifest an increased risk of congenital anomalies.
False
Why do pregnancies complicated by GDM not show an increased risk of congenital anomalies?
GDM develops after the critical period of organogenesis.
What are the maternal complications of diabetes mellitus (DM) in pregnancy?
Hypertension/preeclampsia, polyhydramnios, growth abnormalities, delayed organ maturity, end-organ involvement, pyelonephritis/UTI, increased incidence of spontaneous abortion, labor and delivery complications
Insulin resistance is implicated in the etiology of hypertension
What is polyhydramnios and how is it related to maternal hyperglycemia?
Maternal hyperglycemia leads to fetal hyperglycemia, causing fetal polyuria which is a major source of amniotic fluid
Polyhydramnios is an excess of amniotic fluid in the pregnancy.
What causes intrauterine growth restriction (IUGR) in diabetic pregnancies?
IUGR is due to placental vascular insufficiency
IUGR refers to a condition where a fetus is smaller than expected for the number of weeks of pregnancy.
What is the impact of hyperglycemia on fetal lung maturity?
Hyperglycemia interferes with surfactant synthesis, leading to fetal lung immaturity and respiratory distress syndrome (RDS)
Surfactant is crucial for reducing surface tension in the lungs.
What are some end-organ involvements or deteriorations associated with T1DM and T2DM in pregnancy?
Retinopathy, nephropathy
These conditions can worsen during pregnancy.
What is the role of glucosuria in urinary tract infections during pregnancy?
Glucosuria provides a culture medium for E. coli and other bacteria, increasing the risk of pyelonephritis/UTI
Glucosuria refers to the presence of glucose in urine.
What labor and delivery complications are associated with diabetes in pregnancy?
Preterm labor (PTL), increased incidence of stillbirth, birth trauma due to macrosomia
PTL is commonly associated with poor glycemic control.
What neonatal complications can arise due to maternal diabetes?
Hypoglycemia, hyperbilirubinemia and jaundice, hypocalcemia, polycythemia
These conditions are related to the infant’s response to maternal hyperglycemia.
Fill in the blank: Hyperglycemia stimulates fetal _______ production.
erythropoietin
Erythropoietin is a hormone that stimulates red blood cell production.
What is neonatal hypoglycemia?
Due to pancreatic hyperplasia and excess insulin secretion in the neonate
Neonatal hypoglycemia is a condition where a newborn has low blood sugar levels.
What causes hyperbilirubinemia and jaundice in neonates?
Due to prematurity and polycythemia
Hyperbilirubinemia is an excess of bilirubin in the blood, leading to jaundice.
What is the pathophysiology of hypocalcemia in neonates?
Exact pathophysiology not understood, may be related to functional hypoparathyroidism
Hypocalcemia refers to low calcium levels in the blood.
What stimulates fetal erythropoietin production in neonates?
Hyperglycemia
Erythropoietin is a hormone that promotes the formation of red blood cells.
Fill in the blank: Neonatal hypoglycemia is due to pancreatic _______ and excess insulin secretion in the neonate.
hyperplasia
Pancreatic hyperplasia refers to an increase in the number of cells in the pancreas.
How does aniridia occur?
Through dominant inheritance or sporadically
It can be inherited or arise without a familial link.
What complications may patients with aniridia develop?
Wilms tumor, glaucoma, nystagmus, and other vision problems
These are serious conditions that can affect the overall health of patients with aniridia.
Is there an association between aniridia and maternal diabetes?
No
Aniridia is not associated with maternal diabetes.
In which populations is cleft palate more common?
More common in Asians and least common in blacks
This indicates a variation in prevalence across different ethnic groups.
Is cleft palate usually associated with infants of diabetic mothers?
No
This condition is not typically linked to maternal diabetes.
What is a key feature of Beckwith-Wiedemann Syndrome?
Macroglossia
This overgrowth syndrome includes several features such as liver and kidney enlargement.
