Insulin is a common drug that may be prescribed to some, as it’s widely agreed upon as an effective line of treatment. However, Dr Sahana K P, Consultant Obstetrician and Gynaecologist, Apollo Hospital, emphasises that a clear understanding of insulin safety, benefits, and limitations during pregnancy is important.
Is Insulin Safe During Pregnancy?
Insulin is considered safe for pregnant women and is approved for use during pregnancy when prescribed by doctors. According to the American Diabetes Association (ADA), insulin is the preferred choice of treatment for gestational diabetes. It is important for women with type 1 diabetes and may also be given to patients with type 2 diabetes.The main factor making the use of insulin safe is that it is not able to cross the placenta in clinically significant quantities. Thus, there would be no direct exposure of the unborn child to the drug.
Insulin is used to regulate blood sugar and, thereby, eliminate the risk of complications associated with elevated blood glucose levels. However, the insulin type, dose, and therapy plan should be developed individually for each pregnant woman.
Insulin is considered a safe and effective treatment for managing high blood sugar during pregnancy, as it does not cross the placenta in significant amounts to affect the developing baby.
Why is Insulin Prescribed During Pregnancy?
Hormonal changes during pregnancy reduce the sensitivity of cells in the body to insulin. This is referred to as insulin resistance. If the pancreas fails to release sufficient amounts of the hormone, glucose accumulation in the blood can begin.Insulin is indicated in cases such as:
- Glucose levels in the blood remain elevated despite dietary and exercise changes
- Type 1 diabetes case with a woman having been diagnosed with diabetes before the pregnancy
- Need for more support from insulin so that glucose levels are regulated
- Uncontrolled levels of blood sugar due to gestational diabetes
What Does Research Say About Insulin and the Baby?
Dr Sahana K P says clinical evidence supports insulin as an effective treatment for managing diabetes during pregnancy. The ADA's 2026 Standards of Care identify insulin as the preferred medication for gestational diabetes and recommend it for managing type 1 diabetes during pregnancy.Insulin helps control maternal blood glucose, reducing the baby's exposure to high glucose levels. This is important because excess glucose can cross the placenta and stimulate the baby's pancreas to produce more insulin, potentially contributing to excessive growth.
Good glucose control can help:
- Reduce the baby's risk of developing obesity later in childhood
- Lower the risk of birth complications associated with diabetes
- Reduce the risk of neonatal hypoglycaemia, or low blood sugar after birth
- Support healthier pregnancy outcomes
What Are The Possible Side Effects of Insulin?
Although insulin is generally safe during pregnancy, it can cause side effects. The most important concern is hypoglycaemia, which occurs when blood glucose falls too low.Common warning signs include the following:
- Sweating and trembling
- Sudden hunger
- Dizziness or weakness
- Palpitations
- Difficulty concentrating
- Injection-site irritation
Insulin is a proven and safe treatment option for controlling diabetes in pregnancy. Studies show that insulin is effective when dietary changes are insufficient or when the use of insulin is essential. Pregnant women should consult their doctor instead of postponing treatment for fear of the use of insulin. Regular blood sugar testing, a healthy diet, proper exercise, and prenatal appointments make it easier to maintain the correct blood sugar levels and ensure proper health for both mother and baby.
FAQs on Is Insulin Safe During Pregnancy? What Research and Doctors Say
- Can insulin affect the baby’s brain development?
Insulin prescribed during pregnancy is generally considered safe for the developing baby and does not directly harm brain development. However, poorly controlled maternal diabetes can increase the risk of pregnancy complications. Maintaining blood glucose within recommended targets supports healthy foetal development. - Is insulin safe to be used while breastfeeding?
Yes, insulin is generally safe to use while you are breastfeeding your baby. It does not pass into breast milk in clinically significant amounts and is unlikely to affect the nursing baby. However, insulin requirements may decrease after delivery, so glucose monitoring and medical guidance are important. - Can insulin requirements increase as pregnancy progresses?
Yes, insulin requirements often increase during the second and third trimesters because pregnancy hormones increase insulin resistance. Regular blood glucose monitoring helps healthcare providers adjust doses accordingly. Individual requirements vary, and insulin should never be adjusted without medical guidance.