Fasting is a feature of many of the world’s religions, such as Islam, Christianity and Judaism. It’s been practised for many generations, including during pregnancy and breastfeeding.
Religions that promote fasting have rules to ensure you fast safely during pregnancy and breastfeeding. Australian health authorities also have helpful guidelines regarding how to fast safely.
What is fasting?
Fasting is when you don’t eat or drink anything for a certain period of time. Depending on your religion, it may be for certain days of the year or for a whole month.
Which religions require fasting, and for how long?
The Islamic religion requires every healthy adult to fast from sunrise to sunset during the 9th month of the year, known as Ramadan. As the month of Ramadan is set by the lunar calendar, the solar (Gregorian) date will change from year to year. The length of the fast varies between 11 and 19 hours each day, depending on whether Ramadan happens in the winter or summer.
Judaism has several major and minor fast days, and the most strictly observed is an almost 25-hour fast called Yom Kippur. Eating and drinking is forbidden from sundown on the eve of Yom Kippur, until the next sundown.
Christians usually fast on Ash Wednesday and Good Friday and usually don’t consume meat on any Friday of the year. When you are fasting, you are allowed one full-size meal during the 24-hour period and 2 smaller snacks throughout the day.
During the 6-week period of Lent, many Christians abstain from a luxury or certain food of their choice.
Is religious fasting still mandatory for pregnant women?
A Muslim woman who is pregnant or breastfeeding during the month of Ramadan is exempt from fasting. However, if she is feeling healthy, she may choose to fast.
Christians who are pregnant or breastfeeding are also exempt from fasting on Ash Wednesday and Good Friday. But they can if they are healthy and choose to do so.
The different Jewish fasting days pose different levels of stringencies. For the 3 less strict fasting days, pregnant and breastfeeding women are exempt from fasting.
On the 2 more stringent fast days (Yom Kippur and Tisha Ba’av), observant pregnant and breastfeeding women who are otherwise healthy can consider fasting.
You should talk to your doctor or midwife before you fast. There are many religiously-observant GPs (general practitioners) in Australia who can explain any risks associated with fasting – while being sensitive to your religious or spiritual needs.
How do I fast safely while pregnant or breastfeeding?
If you are pregnant and intend to fast, it’s best to plan ahead.
During Ramadan, in the hours where it is permissible to eat – or throughout the day before the Jewish Yom Kippur fast – drink plenty of water to stay hydrated throughout the fast. This is especially important if Ramadan falls during the summer when the fast is longer and the weather is hotter.
Christians can still drink during their fasting days, so water, juice, tea and coffee is allowed.
Throughout pregnancy and breastfeeding it is important to eat nutritious food as part of a well-balanced diet, especially before and after a fast.
When should I consider
It is not recommended to fast for Ramadan if you are pregnant in your second or third trimester.
While fasting on Yom Kippur is required by Jewish law even while pregnant or breastfeeding, a woman who goes into labour on Yom Kippur should not continue her fast. A woman who has given birth up to 3 days before Yom Kippur should also not fast.
During Lent, pregnant and breastfeeding women are exempt, so unless you choose to fast, you don’t have to.
Can fasting harm my baby?
While research on the effects of fasting on pregnancy is limited, studies have shown that fasting during pregnancy does not affect the baby’s birth weight or increase the chance of a preterm birth.
Does fasting affect breastfeeding?
If you are breastfeeding and planning to fast, drink extra fluids in the days leading up to, and during, the fast – if possible. Try to minimise physical activities and exposure to heat as much as possible while fasting.
Fasting while breastfeeding is not likely to cause any harm to your baby, and you can continue to breastfeed as usual on the day of the fast. It’s important to breastfeed as you usually would to keep your baby hydrated. You can check your baby’s hydration by monitoring their poos and wees and comparing it to a usual day. If you are concerned about your baby’s hydration, speak to a healthcare professional.
You may find that for the next day or so after the fast, your baby may seem hungrier and want to feed more often. This is normal and you will settle back in to your usual feeding routine in a few days.
Every woman is different, and the decision to fast while pregnant or breastfeeding is an individual one.
If you are concerned about your ability to fast while pregnant or breastfeeding, seek advice from a trusted healthcare professional (such as your doctor, midwife or lactation professional).
You can also seek advice from your religious authority. Consider speaking to a doctor who shares your religious heritage.
Muslim women with questions on Islamic law can visit Muslim Women Australia. You can also contact the United Muslims Australia Religious and Advice Support service.
For advice on Jewish observance, pregnancy, breastfeeding and fasting, visit Nishmat, an internationally-recognised institute for women’s health and Jewish law, run by women.
Catholics can contact the Catholic Church in Australia if you have any questions about Lent.
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Is Intermittent Fasting While Pregnant Safe and Healthy?
During pregnancy, your body will grow and change — as you probably well know, if you’re expecting. These changes will become even more fast and furious as you get closer to your delivery date.
For some, these changes can be a little disconcerting. But if you’re worried you’re gaining too much weight, it’s important to know that there’s a wide range of what’s considered healthy.
If you’re still concerned, you may wonder if intermittent fasting (IF) can help you manage your weight and other health concerns during pregnancy. Or maybe you’ve already been practicing intermittent fasting and want to know if you can continue for the next 9 months.
What should you do? Well, before you make any changes to your eating habits, it’s a good idea to call your doctor to go over the pros and cons. In the meantime, here’s the 411 when it comes to IF and pregnancy.
What you need to know
Intermittent fasting is not recommended during pregnancy.
Related: Weight before pregnancy is a bigger health factor than weight gain during pregnancy
People who engage in intermittent fasting eat the bulk of their calories within a certain period of time. There are several approaches to this way of eating.
Some people eat daily, choosing a specific window in which to eat. In the 16:8 method, you might choose to eat between the hours 12 p. m. and 8 p.m. each day — meaning you’re eating in an 8-hour window. The other 16 hours out of the day are considered fasting.
Alternatively, people may choose to eat normally some days of the week, say 5 days, and fast (or eat a couple low-calorie meals) on the other 2, like in the5:2 method.
There’s a good amount of research surrounding intermittent fasting and how it puts the body into a fat-burning state called ketosis. Beyond that, fasting regularly may help:
reduce inflammation in the body
decrease blood sugar and blood pressure
lower cholesterol levels
And other research suggests that fasting may lower risk factors for things like diabetes, cardiovascular disease, and some cancers.
Weight loss is a big focus of research on IF, and fasting is believed to help with shedding weight because it shifts the body to running on fat stores. It may also help reduce overall caloric intake.
In one small 2007 study, participants lost a whopping 8 percent of their body weight in just 8 weeks following alternate day fasting. This means they ate normally every other day and consumed just 20 percent of their normal calories on the “off” days.
Related: 10 health benefits of intermittent fasting
Always speak to your doctor before making any significant changes to your diet and exercise habits.
Intermittent fasting is generally not recommended to women during pregnancy.
There isn’t a whole lot of research to provide informed recommendations on whether there are positive or negative effects on the pregnancy. There are no studies that looked at intermittent fasting over the entire pregnancy.
Many of the studies you’ll find on pregnant women and fasting revolve around the Muslim holiday of Ramadan, which is about 30 days. During this lunar month, people fast from sun up to sun down. While pregnant and breastfeeding women are technically exempt from the practice, some still carry on with fasting.
An older 1996 report noted a study on Gambian women suggests that those who fasted during Ramadan did experience big changes in their glucose, insulin, and triglyceride levels, as well as in other health markers. The weight of their babies at birth, however, was comparable to the babies of women who didn’t fast. Still, the researchers explain that fasting during pregnancy may have health implications that appear later in life and should, therefore, be avoided.
A more recent study echoes these results and showed that fasting for Ramadan didn’t impact birth weights of babies. Beyond that, there was no association with fasting and preterm delivery. Just as in the previous study, though, the researchers conclude that more study is needed on fasting and its potential adverse health effects.
One thing we know is that pregnancy is a time when you need to focus on:
helping your baby gain weight
providing nutrition to help with brain and body development
developing maternal fat stores if you plan to breastfeed
Dramatically changing eating habits may lead to nutritional deficiencies and other health issues for both you and baby. Fasting may also alter hormone levels.
Notably, studies that look at IF and pregnancy deal primarily with birth weight. There are so many other possible outcomes that haven’t been studied — such as risk of pregnancy loss and later effects on children whose mothers did IF, for example.
Above all, the way fasting affects your body and pregnancy is unpredictable and likely different from how it may affect somebody else. For this reason, the American College of Obstetricians and Gynecologists recommends that you work with your healthcare provider to develop an individual plan for weight gain based on your body mass index (BMI) and overall health.
For women with BMIs in the 18.5 to 24.9 range, this typically means gaining between 25 and 35 pounds eating a balanced diet of whole foods and drinking plenty of water. Those with more weight may need to control gain under the guidance of a doctor with careful monitoring of their baby’s growth.
What if I practiced IF before pregnancy?
We may sound like a bit of a broken record, but speak with your doctor — even if you’re already in a fasting groove that works for you. It may be OK for you to continue fasting, just not quite as intensely as you might be used to.
Be sure to tell your doctor your entire history with intermittent fasting, as well as your goals with continuing it during pregnancy.
Related: The third trimester: Weight gain and other changes
While the long-term implications aren’t totally clear, researchers did examine women fasting for Ramadan and how it affected things like fetal breathing. When women had low glucose levels from fasting, it took them a “significantly” longer amount of time to detect fetal movements.
Low frequency of fetal movements is generally considered a warning sign you need to take seriously, especially as you get closer to your delivery date. Your baby should make around 10 movements within 1 to 2 hours — and you should usually be able to feel 10 movements within just half an hour.
With restricting eating to certain windows or days, it may also be difficult to get the right amount of nutrition in when you are eating. This is made even more difficult because your baby is pulling from your nutrition stores as well.
Issues like iron deficiency anemia are already more common in pregnant women. And when a baby doesn’t get enough iron — particularly in the third trimester — they may be at higher risk of developing anemia before their first birthday. This is scary stuff, but fortunately, getting good nutrition makes these risks go way down.
Related: Health risks associated with pregnancy
To keep weight gain steady but healthy, most women should aim to consume 300 extra calories each day. That’s a little extra — like a glass of skim milk and half a sandwich — but certainly not the “eating for two” you may have heard before you got pregnant.
Exercise is another part of the equation. You may feel cruddy — especially in the first trimester — but moving your body may even lower your risk of gestational diabetes, help shorten your labor, and reduce your cesarean delivery risk.
If you’ve exercised before pregnancy — great! Ask your doctor if you need to modify your routine and keep going. If you’re new to workouts, focus on getting around 30 minutes each day of moderate activity, like walking, swimming, or cycling on a stationary bike.
Related: Maintaining a healthy pregnancy
Now, for some pretty cool news. Studies show there’s a “mutually beneficial” link between diet and fertility.
Intermittent fasting may have some power when it comes to fertility in women with polycystic ovary syndrome (PCOS). In one recent study, women with obesity and PCOS who fasted regularly saw an increase in their levels of luteinizing hormone, which is responsible for aiding in ovulation.
Other information suggests that weight loss of 5 to 10 percent may help with reproduction. Since intermittent fasting may help in this area, as well as with insulin resistance and other health issues, it’s possible that fasting may “enhance” overall fertility and health of the reproductive system.
Related: A look at your fertility timeline
It’s probably not a good idea to delve into fasting during pregnancy — especially if you’ve never tried it before.
The good news is that pregnancy doesn’t last forever, and you can definitely try this method of eating to lose weight after you deliver. (But again, check with your doctor — who just might be your BFF by now — if you’re breastfeeding.)
And if you’re feeling overwhelmed, do ask for help. Your healthcare provider will track your weight at each of your prenatal appointments. Talk about your concerns about gaining too much to see if they have suggestions to help you scale back — if needed — in a way that keeps both you and baby healthy and on target.
Diet in early pregnancy slows down fetal development
Diet in early pregnancy slows down fetal development - Gazeta.Ru
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Malnutrition during pregnancy can slow down the development of fetal organs, particularly the brain. This, in turn, can have long-term consequences, such as lowering the IQ of the offspring, as well as the emergence of a predisposition to behavioral problems.
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Modern ladies who prefer to keep a good shape, that is, thinness, even during pregnancy (the most famous of them without five minutes is the mother of four children, Victoria Beckham), thus harming their unborn children, a study by American scientists has shown. The brain of the fetus, as it turned out, is sensitive to even a moderate lack of nutrition of the mother's body.
Thus, a diet in early pregnancy slows down the development of the brain in the fetus.
At least this is how the processes proceeded during the pregnancy of model organisms of primates - baboon monkeys, an article about the study of which physicians published in Proceedings of the National Academy of Sciences .
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Scientists observed pregnancy in two groups of female primates at a special nursery in San Antonio, Texas. One group of “ladies” was allowed to satisfy their appetite in the first trimester of pregnancy according to their needs, and the second group sat on a moderate diet: their diet was reduced by 30% - about how expectant mothers in the United States lose weight.
It turned out that maternal nutrition affects the fetus both at the cellular and molecular levels.
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Thus, maternal nutrition is absolutely essential for the development of the fetus, as it regulates the basic foundations of cellular mechanisms.
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The dangers of a sharp lack of nutrition (hunger) for the development of the fetal brain have been known for a long time, but the new work is the first scientifically substantiated confirmation that even a moderate diet does not go unnoticed for the development of the fetus.
Partially similar to diets and malnutrition are teen pregnancies: in their case, the fetus receives insufficient nutrition, as the still growing mother's body needs it. In late pregnancies, the fetus also suffers from malnutrition, but for other reasons: the maternal arteries become harder, and this disrupts the blood supply to the uterus, inevitably disrupting the fetal diet. A similar effect occurs with preeclampsia (late toxicosis of pregnant women) - here the fetus is “malnourished” due to dysfunction of the placenta.
"Starving fetus" lags behind in the formation of intercellular connections, cell division and the volume of growth factors - hormones that stimulate growth.
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It is in the first half of pregnancy that nerve cells are formed - the neurons of the brain, as well as all the auxiliary brain cells necessary for their work. Malnutrition during this period affects directly this process.
“Our study is further evidence of the importance of good maternal nutrition and health. Malnutrition during pregnancy can slow the development of fetal organs (we see this in the brain), and this, in turn, can have long-term consequences - a decrease in the IQ of the offspring, as well as a predisposition to behavioral problems, ”says Dr. Thomas McDonald, who led work.
Scientists urge mothers to eat well and be aware of the dangers of malnutrition for their unborn children. They emphasize that the study is quite reliable, since model primates provide a very high-quality imitation of processes in the human body.
Much of this research has previously been done in rats.
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Fasting during pregnancy
Before answering this question, let's read the contraindications to the use of curative fasting, where pregnancy, regardless of the term, is an absolute contraindication.
And this is reasonable, because during pregnancy, especially in its first half, any intervention in the woman's body is very undesirable. At this time, it is not recommended to use drugs, alcohol. Obviously, fasting should not be used either.
Moreover, it is difficult to find reasons why it is so necessary to fast during pregnancy. Fasting for weight loss, cleansing, treatment of diseases is best done before or after pregnancy. And at the time of bearing a child, it is best to pause.
Effect of fasting on the fetus
It may happen that a woman goes hungry without knowing that she is pregnant. Such cases were noted and they did not have any negative effect on the fetus. Although it is believed that fasting in the first trimester of pregnancy can lead to fetal fading. It should immediately be noted that this applies to fasting for at least more than 5 days.
Short fasting for a period of 1-3 days cannot affect pregnancy in any way. During this time, significant changes in the body do not occur and such starvation usually does not affect the fetus. In addition, our body is quite adapted to the irregular intake of food.
Fasting longer periods may have an effect on the fetus, but it is difficult to say what effect this will be without experimental confirmation. One can only assume that at the initial stage of pregnancy, prolonged starvation can lead to the fact that the survival of the mother's body will be more important than the survival of the developing fetus. But these are only assumptions that have not been proven by practice and have not been studied in humans.
There are references to a study of the influence of malnutrition during the war in Holland on the subsequent development of offspring. But malnutrition in a stressful situation is in no way comparable to voluntary complete starvation.
With regard to late fasting, there is an opinion of fasting experts that it can be beneficial for both the mother and the fetus. At the same time, the use of even long periods of fasting for more than 10 days is not denied. However, all this is subject to the experience of previous fasting in the mother.
So Herbert Shelton recommends fasting to pregnant women when symptoms of toxicosis appear: “The stomach and body of a toxic woman protests, they reject food, the liver increases its excretory function. Much bile is vomited into the stomach and vomited out. It may even develop a physical aversion to food - such is the requirement of the body to cleanse.
If only once we understood that nature does everything to prepare a clean and healthy home for the birth of a new life, we would understand the need to help her in these conditions and would not stick sticks in the machine of life. Suppression of vomiting with medication and continued eating only worsens and prolongs the condition. Fasting will be the only way to cleanse the body of accumulated toxins.
Therefore, as soon as the pregnant woman feels a slight approach of nausea and vomiting, she should voluntarily stop eating. It won't hurt her or the baby. A long fast can be harmful, but a few days of abstinence at the beginning of pregnancy (which is especially recommended for women with "morning sickness") will definitely help. She should go to bed and rest warm. It is necessary to discard all fears and mentally relax. Do not take any medication. My experience is that fasting for 3 to 10 days is enough to bring the body in order and save a woman from nausea and vomiting for the rest of the pregnancy. ”
But, nevertheless, most authors agree that it is not worth starving during pregnancy. This is especially true for dry fasting.
In what cases can you starve during pregnancy.
With toxicosis of pregnancy, it is quite possible to use fasting on water for 1-2 days, regardless of the period.
Longer fasts should not be used during pregnancy.
Dry fasting is also not recommended.
If you want to cleanse the body, then spend several courses of cleansing fasting for a period of 7-10 days before pregnancy. This will undoubtedly improve your condition during pregnancy, facilitate its course and will contribute to a better development of the fetus.
After all, a healthy and “clean” mother's body is a guarantee of a strong future offspring.
Pregnancy is not a disease, it is a physiological process and nature has taken care to protect the fetus from the possible negative impact of the environment on the child's body.
Ideal conditions for pregnancy do not exist. There have always been and will always be risks of harmful effects. If earlier it was hunger, lack of food, wars, various stresses, now it is the same stresses, toxic effects of the environment, sedentary lifestyle, overeating.