In early pregnancy it is common to be hungry and yet feel your stomach turn at the smell of food, with nausea carrying on all day. When it becomes severe, the burden is heavy enough to unsettle daily life as a whole.
Morning sickness is sometimes read as a sign that the baby is growing well, but when the symptoms go too far they can affect the mother's strength and nutrition. It helps to know how to adjust the way you eat and drink, and how to check yourself for dehydration.
01
If smells have become overwhelming, how should meals change?
Key point
When morning sickness is severe, the first step is to move away from three set meals a day and eat small amounts every 2 to 3 hours. A long stretch on an empty stomach makes nausea worse, so eating little and often is the foundation of relief.
Eating small amounts every 2 to 3 hours instead of three meals a day helps during the worst period, because nausea worsens when the stomach empties completely. Keeping dry carbohydrates such as crackers or biscuits by the bed and chewing them slowly just before getting up is an effective way to help prevent nausea caused by an empty stomach.
Oily or strongly scented food easily triggers nausea in early pregnancy, when the sense of smell is heightened, so meals built around cool, bland, protein-rich foods works better than hot soup. Sour foods such as lemon or plum help settle nausea by regulating saliva.
- Small and frequent — instead of three meals a day, eat a little every 2 to 3 hours to reduce nausea from an empty stomach
- Dry carbohydrates against an empty stomach — keep crackers or biscuits by the bed and chew them slowly just before rising
- Choose low — fat, low-odour protein — cool, plain food rather than hot dishes reduces the stimulus to the sense of smell
02
How do I tell morning sickness I can ride out from the kind that needs care?
Key point
Rather than simply enduring it, check the signals your body sends. If your urine darkens and you pass it 3 times a day or less, or if your weight has fallen 5% or more below your pre-pregnancy weight, dehydration and poor nutrition may be under way, and a consultation should be considered.
When the body runs short of fluid, morning sickness tends to worsen in a vicious circle, so enduring it is not always the answer. If your urine is a dark brown and you are passing it 3 times a day or less, that should be read as a signal that dehydration is under way.
If drinking a lot at once is difficult, letting ice melt slowly in your mouth or sipping an electrolyte drink in small amounts, while monitoring whether you can keep the fluids down, can help. If your weight has fallen 5% or more below your pre-pregnancy weight in a short period, the situation may go beyond ordinary morning sickness, so weight should be checked regularly.
- Check dehydration by urine colour — dark brown urine passed 3 times a day or less can mean dehydration is under way
- Watch how fluid is absorbed — let ice melt in your mouth or sip an electrolyte drink and see whether the body takes it in
- Track weight loss — a fall of 5% or more below your pre-pregnancy weight should raise the question of poor nutrition
03
Do I have to give up caffeine completely during morning sickness?
Key point
Caffeine does not have to be given up completely, but in early pregnancy it is safer to keep it to 200mg a day or less and to choose decaffeinated where possible. Caffeine does not directly cause birth defects, but it can narrow blood vessels and reduce blood flow to the placenta.
In early pregnancy the placenta is not yet fully developed, so caffeine can affect the baby directly, and a foetus cannot break caffeine down and clear it as an adult can, so it stays in the body far longer. Material from the Korean Society of Obstetrics and Gynecology also explains that the vasoconstriction and diuretic effect of caffeine can reduce blood flow to the uterus and lower the oxygen supply.
There is no evidence that caffeine intake itself directly causes birth defects, so there is no need for undue anxiety. Keeping to 200mg a day or less, roughly a single cup of coffee, and shifting toward decaffeinated drinks is the realistic approach. Green tea and black tea contain caffeine too, so the total intake has to be counted.
Doctor's view
How the doctor decides
Seeun Cho, Medical Director · Obstetrics & Gynecology Specialist
I do not conclude anything is wrong from caffeine alone
I do not conclude that there will be a problem with the baby simply because a patient drank coffee in early pregnancy. It is clear that caffeine can narrow blood vessels and act as a diuretic, reducing blood flow to the uterus, but there is no evidence that this by itself causes birth defects. I do advise keeping to 200mg a day or less and choosing decaffeinated.
I check for dehydration before asking how bad the sickness is
Rather than asking how often you have felt sick, I ask first about urine colour and how often a patient passes urine. If the urine is dark brown and comes 3 times a day or less, the dehydration has likely gone past what can simply be endured, and that is how I tell whether fluids or medication are needed. I also check whether weight has fallen 5% or more below the pre-pregnancy figure.
I go over the tests due at that stage first
I check how many weeks along a patient is and then go over the tests that belong to that stage. Early on it is the position of the sac and the heartbeat; in the second trimester it is screening for foetal anomalies and gestational diabetes. So even when someone comes in for morning sickness, we ease the symptoms and also check that nothing due at the current stage has been missed.
Summary
In summary
Morning sickness in early pregnancy is partly a sign that the baby is growing well, but when symptoms are severe, changing how you eat and drink alone can bring relief. If there are signs of dehydration or poor nutrition, being seen is safer than enduring it, and it is worth having a consultation suited to how many weeks along you are.
FAQ
Frequently asked questions
When does morning sickness start and when does it end?
It generally begins in early pregnancy and often settles as the second trimester arrives. The degree varies widely between individuals, so watching the signals your body sends is the safer approach.
Can I take medication when morning sickness is severe?
If your urine darkens and you pass it 3 times a day or less, or your weight has fallen 5% or more, it is better to be seen than to endure it, and to be helped by pregnancy-safe anti-nausea medication or intravenous fluids.
Do I have to give up coffee completely?
It does not have to be given up completely, but keeping to 200mg a day or less and choosing decaffeinated is better. Green tea and black tea also contain caffeine, so the total intake should be taken into account.