Religious fasting and breastfeeding

Many religions and cultures include periods of fasting. This often means not eating or drinking for a set time or limiting certain foods or meals.

Choosing whether to fast while breastfeeding is personal. Some mothers choose to fast, while others decide not to or to wait until another time.

Practices can vary a lot. Many religions allow some changes for mothers who are pregnant or breastfeeding or who have health needs. What this looks like can differ depending on your beliefs and personal situation. In some cases, fasting may be delayed, shortened or replaced with other practices.

If you’re unsure what’s right for you, it may help to talk with a trusted health professional and your religious or community advisor.

Ramadan (Islam)

Ramadan is a month-long religious observance. It involves fasting (no food or drink) from sunrise to sunset each day. The length of the daily fast can vary, depending on the time of year and where you live.

Some Muslim mothers who are breastfeeding choose to fast. Others may delay or make up the fast at another time, depending on their situation and beliefs.

Yom Kippur (Judaism)

Yom Kippur is a special day of fasting that lasts for about 25 hours, from one sundown to the next.

Jewish mothers who are breastfeeding can consult a Rabbi or the Nishmat for more information about fasting for Yom Kippur. 

Research on fasting and breastfeeding is reassuring.

• The main nutrients in breastmilk usually stay similar during short fasts.
• Some vitamins and minerals in breastmilk may change for a short time.
• Babies continue to grow well when breastfeeding mothers fast for short periods.

Many babies continue to breastfeed as usual during a fast. Some may feed more often, especially in the day or two after the fast.

Short-term fasting does not usually affect how much milk your body makes.

Milk supply can be affected if you become very dehydrated or are not getting enough energy over time. Eating and drinking enough outside fasting times helps support your milk supply and your own wellbeing.

Healthy mothers are likely to manage well with short-term fasting. However, it’s always a good idea to check with your doctor before fasting. 

If you choose to fast while breastfeeding, these tips may help:

• Expect some changes in feeding patterns
  Your baby may feed more often at certain times, such as overnight or after the fast.
• Drink plenty of fluids when you can
  Try to drink regularly before and after your fast so you begin well hydrated. Water is the most hydrating fluid.
• Eat regularly during non-fasting times
  Eating a variety of foods can help support your energy levels.
• Take things more slowly if needed
  You may want to rest more and avoid heat where possible.
• Keep a check on your baby
  Look for signs your baby is getting enough milk, such as regular wet nappies and alertness between feeds.

If you feel unwell, dizzy, or very tired, it may help to stop fasting and seek advice.

More information for breastfeeding mothers who are planning to fast for Ramadan can be found in the downloadable resources below.

These were created with the support of the ACT Government under the ACT Health Promotions Grants Program.

Breastfeeding and Ramadan (English)

Breastfeeding and Ramadan (Arabic)

Breastfeeding and Ramadan (Urdu)

© Australian Breastfeeding Association June 2026