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Pregnancy and Blood Sugar: A Conundrum
June 14, 2019


Pregnancy and blood sugar related problems were a big issue in primary health care in a developing country like India. Gestational Diabetes Mellitus (GDM) is found to have  a prevalance of around 10% in India which is causing a huge headache for the Obstetricians as they need to colloborate with a diabetologist and a special team in tackling this menace. Above all, there are women with Type 1 diabetes and Type 2 diabetes conceiving without preplanning pregnancy, which might affect the health of baby and the mother. Extensive studies and researches have been conducted in this particular area as mothers health and babys health is given utmost importance in deciding a countrys developmental parameters.In this background we need to know why it needs special attention and what are the normal physiological changes during pregnancy.

Normal pregnancy is a period of physiological changes in body which will reflect in lot of blood tests too. It is divided into three trimesters where changes in each trimester is critical for a person undergoing this change to understand. The mother to baby passage called the placenta is the passage channel for all nutrients essential for the baby. The placenta secretes various hormones and chemicals too which can alter the blood glucose levels. Early pregnancy or the first few weeks of gestation is usually a period of increased insulin sensitivity and increased insulin secretion. As it reaches the late first trimester the insulin resistance increases exponentially as a mechanism to deliver adequate nutrition to the growing baby inside the mother. Thus the diabetes of pregnancy AKA Gestational Diabetes Mellitus is seen during this period of increased insulin resistance, the second trimester.

Increased blood sugars during pregnancy:

This can happen due to any of the following possibilities

1. Known type 1 or type 2 diabetes patient getting pregnant

2. Gestational diabetes mellitus

3. Impaired glucose tolerance

It is very important to educate and inform all the adolscent girls regarding the effects of high blood sugar during pregnancy. Because each pregnancy has to be planned properly with the sugars reaching adequate control even before conceiving as increased blood sugars during conception or undetected early pregnancy can cause even fetal malformations or death. So it starts with appropriate contraception and planning pregnancy at a pre conception level for all girls with diabetes just to make sure the baby and the mother stay healthy even post delivery.

Symptoms to watch out for:

Early detection is the key in diabetes management to avoid complications. In a normal healthy individual its easy to identify diabetes symptoms . You need to watch out for increased urination, increased thirst, increased hunger, tiredness, delayed wound healing, sexual disturbances or even it maybe totally asymptomatic, detected during a routine check up. But things are difficult in pregnancy as all these symptoms can occur in normal pregnancy too. The best thing to confirm is to get your blood sugar checked , maybe even before , when you plan pregnancy and during each trimesters as the tests are different and cut off values are also different before and after conception.

What to do if blood sugars are high:

If your blood sugars are high go to a specialist and take help. There are only very few treatment options in diabetes during pregnancy and certain tablets cannot be given. It is also found that proper nutrition and life style modifications can help women to achieve normoglycemia during pregnancy. A recent study suggested that 70-85% of women diagnosed with GDM can control GDM with lifestyle modification alone. So its essential that a pregnant women with derranged blood glucose values be treated by a team of diabetologist, dietician and diabetes educator when available. The earlier we intervene, the better the outcome.

Steps to be taken before starting medications:

Once high blood sugars are detected, treament starts with medical nutrition therapy, physical activity and weight management. Medical nutrition therapy is decided individually by the trained dietician as proper nutrition is also essential for the growth of the baby. It is very important that a pregnant women with diabetes eat consistent amount of carbohydrates to match with the treatment given and avoid low sugars as well as high sugars. The Dietary Reference Intake for all pregnant women recommends a minimum of 175g of carbohydrate, a minimum of 71g of protein, and a 28g of fiber. Other than the physical and diet aspects mental support from the family members is an important factor for the adequate management.

What all can be given:

Insulin is the treament of choice for sugar control in pregnancy. The second line tablets, which can be given are metformin and glyburide , but both of these can cross palcenta to reach the babys body. The fear of taking insulin by the patient should be taken care by the health care providers to make them understand and give necessary counseling regarding the same.  Taking multiple injections of  insulin can be a stress for the patient and thus she should be taught the importance of adherence to treatment. Any tablets you were taking before pregnancy for chronic diseases or any other illness should be reviewed as many commonly used tablets are not given during pregnancy. Common tablets such a cholesterol reducing tablets and commonly used anti hypertensives are also included. So be wary of it and inform your doctor regarding all the treatments you are taking.

Difficulties faced when taking treatment:

A lot of patients are scared of taking injections when pregnant, but it should be emphasised that it is for their good health and the babys health. In my experience once a women understands this , they are ready to face anything and everything. Blood sugar variations are a part and parcel of treatment during pregnancy. You might get slightly lower blood sugars than expected or sometimes higher. Dont panic . Your doctor will help you out as every month the insulin sensitivity and metabolism changes in your body during pregnancy. So regular visit to a diabetes care team can prevent you from any untoward reactions. Keep a glucometer at home and check your blood sugars multiple times as doctors advice and as and when required. The symptoms of low sugars are increased sweating, anxiety, tremors, palpitation, headache etc. Check your sugars immediately and take simple sugars immediately if low (i.e. less than 70). Have simple carbohydrates such as glucose powder , around 25 g mixed in water which are available easily in market and consult your doctor immediately if persistent. Keep a diary and note down your blood sugars as and when you are checking with time and relationship with your meals. It will be easy for the diabetologist also to keep a check on your medication dosages with this data you are providing.


Altered blood sugar values are easily managed during pregnancy when found out early and given the best treatment possible with regular visits to the diabetology care team with the active participation of a patient, diabetologist, dietician and a fitness educator. Your pregnancy and your babys health is of utmost importance as it will decide his/her future. So leave your worries to the doctor and enjoy the sweetness of your pregnancy!



DMDSC, Calicut


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