The Science Corner

    A corner of the Internet where you can find short articles and interesting facts related to pregnancy, ultrasound, birth predictions and maternity care. All articles have been reviewed by scientists. More articles are soon to come!

    Food recommendations look different worldwide

    Are you worried about the risk of eating certain foods during pregnancy? Relax! Food recommendations for pregnant women look different around the globe.1

    In India, pregnancy food charts state exactly what should be eaten at what time of the day, including a handful of nuts at 4 pm.2 The charts are modified to suit women’s BMI, reflecting the vast differences in nutrition status of the Indian population.2 Japanese guidelines for pregnant women similarly offer a pregnancy food plan, but for each day of the week. In addition to recommending vegetables, the Japanese food plan has a rather strong focus on seafood.3

    In the Netherlands, precise amounts for each food product are stated, but there is no schedule.4 Sweden and Finland have even less detailed  pregnancy recommendations with pregnancy food charts focusing on the benefits of a diverse diet.5,6

    On the other hand, in the United States, expecting mothers are informed about food safety and how to avoid foodborne illnesses and harmful microorganisms. The focus is hence less on particular foods, but rather on hygiene practices when cooking.7 Pregnant women are for example given precise information on how to wash fruit and vegetables and instructions about how to heat certain foods.7 

    Despite local differences, there are globally well established recommendations to keep a good health during pregnancy, such as the intake of folic acid supplements, the avoidance of alcohol and the importance of a versatile diet combined with exercise.8

    If you feel stressed about what you can or cannot eat, take a deep breath and remember that mothers around the world eat very different diets and that healthy babies are born everywhere.9 With that in mind,  check your country’s pregnancy diet recommendations and enjoy your meals!

    South India4 Japan5 The Netherlands3
    Early Morning 6.30 am

    milk 200 ml

    • 250 g vegetables
    • 2 portions of fruit
    • 4 to 7 full corn bread
    • 4 to 5 spoons of full corn carbohydrate products or 4 to 5 potatoes
    • 40 g cooking fats 
    • 1,5 – 2 L liquid
    • 40 g cheese
    • 3 to 4 portions of dairy products
    • 25 g unsalted nuts
    Breakfast 08.00 am

    2 dosa (Indian lentil pancake) + 100 mg vegetable chutney 


    Rice + grilled fish + dipping

    Mid-Morning 10.30 am

    100 g seasonal fruit


    Pickles + apple + tea 

    Lunch 01.00 pm

    4 roti (a type of bread) + 30 g meat + 50 g green leafy vegetables curry + 50 g salad + 100 ml curd


    Rice + tofu with meat miso + starchy sauce + seaweed salad + clear soup

    Afternoon snacks 04.00 pm

    100 g seasonal fruit + 30 g nuts


    Roasted green tea + Biscuits

    Dinner 08.00 pm

    100 g rice + ½ Tur Dal + 75 g green leafy vegetables + 50 g vegetables + 100 ml curd


    Pasta + salad

    Bedtime 10.00 pm

    100 ml milk


    Milk soup + coffee + sherbet

    Examples of daily food plans (India and Japan) and food recommendations (The Netherlands) for pregnant women. Amounts per day. 

    Wednesday 5 Oct 2022
    Share Click to send heartbeats

    Are you suffering from fear of delivery?

    Up to 20% of pregnant women suffer from fear of childbirth, but this type of severe anxiety can also affect co-parents.

    The upcoming delivery will inevitably be a big event in your life. Nervousness or unrest are normal feelings, but some pregnant women experience high levels of anxiety and can develop a more serious condition called fear of childbirth (FOC). This can range from mild to severe anxiety, the latter sometimes being referred to as tokophobia.1 

    FOC and tokophobia has been shown to affect about 5-20% of all pregnant women, depending on how it is measured.2 However, it is important to know that neither FOC nor tokophobia are feelings limited to those giving birth. Also, co-parents can suffer from anxiety and fear related to childbirth. Research in this area is still limited, but estimations say that as many as 1 out of 10 partners may suffer from FOC.3

    Traumatic events in the past, fear of not being in control and fear of pain have been shown to be associated with FOC.2 Some women are also afraid that their body might not be strong enough to give birth.4

    What can you do if you are pregnant and feel anxiety or fear when thinking of the delivery? Research suggests several ways in which anxiety can be relieved: the first and most important step is to talk to your midwife to get accurate information about the delivery process.1 Sharing your fears with a knowledgeable professional might also be helpful, as well as cognitive behavioral therapy. At many hospitals there are specialized centers for those who suffer from FOC.1 

    Next time you meet your midwife, share your feelings and thoughts. You are far from alone, and there is help available!

    Wednesday 5 Oct 2022
    Share Click to send heartbeats

    Aspirin reduces the risk of preeclampsia

    Preeclampsia affects 5-8% of all pregnant women annually and is a hypertensive condition that globally is one of the main causes of maternal mortality and morbidity in mothers and fetuses.1

    A large number of research studies have shown that one 75 mg tablet of aspirin per day significantly reduces the risk of preeclampsia.2 In some countries, among them Sweden, healthcare authorities therefore have introduced routines for preventive treatment with aspirin. Women belonging to the risk group are recommended to prophylactically take 75 mg of acetylsalicylic acid from week 10-12, until week 36.3

    Preeclampsia is a complex condition and researchers have not yet fully understood its underlying causes.1 The disease is characterized by the placenta not properly attaching to the uterine wall, causing substances that normally only are present in the fetus to enter the mother’s blood stream. The nutrient supply to the fetus also deteriorates.1 The mother’s immune system gets triggered by the unknown substances, giving an inflammatory response that damages the blood vessels and causes them to contract.4,5 This in turn causes proteins to leak into the urine and the blood pressure to rise.4

    Preeclampsia can appear from pregnancy week 20, but usually shows as late as after week 34. The symptoms vary greatly, which makes the condition difficult to diagnose, but typical symptoms are headache, visual problems, swelling or acute pain in the upper abdomen, especially under the ribs on the right hand side.6 Anyone who experiences symptoms such as these during the latter part of pregnancy should contact healthcare.

    At present, there is no other available treatment than to deliver the child prematurely.3 However, blood pressure-lowering medication, reduced stress and monitoring in hospital are measures that can be put in place to postpone a possible premature birth.4 Normally, the symptoms disappear shortly after the baby is born.


    Examples of high risk factors Examples of medium risk factors
    • Suffered from preeclampsia previously
    • Chronic kidney disease
    • Egg donation
    • Diabetes mellitus before the pregnancy
    • Multiple births (i.e twins or more)
    • Chronic hypertension
    • Carrying her first child or more than 10 years since last pregnancy
    • BMI > 30
    • Age > 40
    • Heredity
    • Hypertension early in pregnancy

    Pregnant women with one high risk factor or three or more medium risk factors are considered to belong to the risk group that can benefit from taking Aspirin. Important! Never start any medication on your own, please consult your doctor before starting any medication.

    Wednesday 5 Oct 2022
    Share Click to send heartbeats

    Do you know why to eat folic acid?

    Everyone needs folate (vitamin B9, or folic acid), but it is especially important when you are pregnant or planning to get pregnant.1

    Folate is used by the body for DNA replication (cell division) and in the production of amino acids and vitamins.1 Since it is necessary for the formation of red blood cells, folate deficiency leads to anemia. During pregnancy the need for folate is higher than normal since it is also required for growth and proper development of the fetus.1

    Several studies have shown that a daily intake of folic acid before and during pregnancy can reduce the risk of neural tube defects (NTDs) by up to 72%.2 NTDs are among the most common birth defects, contributing to miscarriage, infant mortality and severe congenital abnormalities.1 Since folate supplement was introduced as a recommendation to women worldwide, the number of children born with NTDs has dropped significantly.1 The finding that folate can reduce NTDs is one of the rare instances in which science has been able to identify preventable causes of birth defects.3

    Folate is a vitamin B found naturally in food, while folic acid is an artificially produced folate that is used as food fortifier and in dietary supplements. Folic acid is more easily absorbed by the body than the folate form.3

    Egg yolk, dark green leafy vegetables (e.g. asparagus, broccoli, spinach and avocado) and various kinds of cabbage, beans, chickpeas, lentils, sunflower seeds, fruits and berries are examples of foods high in folate. The vitamin is heat sensitive and can be easily destroyed by prolonged heating, so fresh vegetables are preferred.4 However, to get enough folic acid during pregnancy, supplements are usually recommended.

    Fact box:

    Amino acids = The building blocks of proteins

    Vitamin B = A group of eight water soluble vitamins. Vitamins are essential nutrients that cannot be produced by the body and hence have to be obtained from food. 

    Congenital abnormality = Malformation present from birth

    NTD (neural tube disorder) = Birth defects of the brain, spine, or spinal cord. The malformations arise when the neural tube fails to close during early embryo development.

    Sunday 8 May 2022
    Share Click to send heartbeats


    I have no special talents. I am only passionately curious

    Albert Einstein (1879-1955)