Yes, you can safely fast while pregnant — Here's what you should know

Fasting during pregnancy often raises concerns, but for most women with low-risk pregnancies, research suggests it poses no harm to foetal development.

While tradition and faith play a role in the decision, understanding the body’s signals and consulting medical professionals remain key to a healthy pregnancy.

Universiti Kebangsaan Malaysia Lecturer and Specialist in Obstetrics and Gynaecology, Dr Siti Hajar Abd Azman, said that fasting is generally safe for most pregnant women with low-risk pregnancies—those without underlying health conditions or pregnancy-related complications.

She explained that as long as the mother can comfortably endure the fasting period without negative effects on her health or concerns about her baby’s well-being, it is deemed acceptable.

“However, some women are exempt from fasting due to medical reasons, such as diabetes, which requires a steady intake of glucose to maintain stable blood sugar levels.

“Prolonged fasting in such cases can be risky, making it advisable for pregnant women diagnosed with diabetes to refrain from fasting.

“Similarly, those experiencing severe nausea and vomiting, commonly known as morning sickness, particularly in the first trimester, may struggle with adequate nutrition and hydration, potentially worsening their overall health and leading to dehydration,” she said in an interview with Sinar Daily.

Dr Siti responded to concerns about whether fasting for 12 to 13 hours a day could affect a baby’s growth, reassuring that research indicated no adverse impact on foetal development.

She explained that babies continue to grow by drawing from their mother’s stored nutrients, emphasising the importance of maintaining good health before pregnancy and following a well-balanced diet throughout.

“Pregnant women with low blood sugar may experience symptoms such as shakiness, excessive sweating at rest, a rapid heartbeat, dizziness, blurred vision, or in severe cases, loss of consciousness.

“Dehydration can cause extreme thirst, fatigue and reduced urination, with urine appearing darker and in smaller amounts.

Pregnant women considering fasting should be informed of these symptoms in advance to allow for proper monitoring.

“Around the 28th week of pregnancy, foetal movements and kicks can typically be felt and counted.

Any noticeable change in their frequency or intensity could indicate distress, requiring the mother to break her fast and seek medical attention,” she added.

Dr Siti highlighted the importance of addressing symptoms early to protect both the mother’s and baby’s well-being.

She advised staying well-hydrated by drinking plenty of water during non-fasting hours and incorporating water-rich foods to help maintain energy levels.

“Monitoring blood sugar may also prevent severe drops, while adequate rest and short naps can help manage pregnancy-related fatigue.

“If fasting leads to significant health concerns, alternative approaches such as shorter fasting periods or breaking the fast earlier may be safer.

“Consulting a healthcare provider for a thorough assessment ensures that fasting decisions are made with both the mother’s and baby’s well-being in mind,” she said.