A high-risk pregnancy involves increased health risks for the mother, the baby, or both. Here are some factors that can classify a mother as high-risk:

Preexisting Health Conditions
1. Diabetes: Both type 1 and type 2 diabetes can complicate pregnancy.
2. High Blood Pressure: Chronic hypertension increases the risk of preeclampsia and other complications.
3. Autoimmune Diseases: Conditions like lupus or multiple sclerosis can pose risks.
4. Kidney Disease: Chronic kidney disease can affect pregnancy outcomes.
5. Thyroid Disorders: Both hyperthyroidism and hypothyroidism need careful management.

Pregnancy-Related Conditions
1. Gestational Diabetes: Diabetes that develops during pregnancy.
2. Preeclampsia: A condition characterized by high blood pressure and signs of damage to another organ system.
3. Multiple Pregnancies: Carrying twins, triplets, or more increases the risk of complications.

Lifestyle Factors
1. Smoking: Increases the risk of preterm birth, low birth weight, and other complications.
2. Alcohol and Drug Use: Can lead to fetal alcohol syndrome and other developmental issues.

Age-Related Factors
1. Teenage Pregnancy: Pregnancies in teenagers are often considered high-risk due to higher rates of complications.
2. Advanced Maternal Age: Women over 35 have a higher risk of complications such as chromosomal abnormalities.

Obesity
1. Overweight and Obesity: Increases the risk of gestational diabetes, preeclampsia, and cesarean delivery.

Other Factors
1. Previous Pregnancy Complications: History of complications in previous pregnancies can increase risk.
2. Infections: Certain infections like HIV or untreated sexually transmitted infections can complicate pregnancy.

If you have any specific concerns or need personalized advice, it’s always best to consult with your healthcare provider.