The first trimester is the stretch of pregnancy where the most changes happen with the least to show for it. Your baby’s major organs form, your hormones shift sharply, and you may feel exhausted or queasy long before anyone else can tell you are expecting. This guide walks through what happens week by week, which visits and tests to expect in Singapore, what to eat and avoid, how to manage work and rest, and which warning signs need urgent care.
If you have just seen a positive test, our earlier guide to early signs of pregnancy and first checks covers testing and confirmation. This article picks up from there and follows you through the opening weeks.
We are a maid agency, not a medical practice. The guidance below comes from HealthHub, the Health Promotion Board and KK Women’s and Children’s Hospital (KKH), and we link to those pages throughout. Your own doctor knows your history and is the right person to advise you.
How long does the first trimester last?
Pregnancy is usually divided into three trimesters. HealthHub’s guide to what happens in the first 12 weeks, contributed by the Health Promotion Board, covers weeks 1 to 12. You may see other sources draw the line a week later, so do not be surprised if your clinic’s leaflet uses slightly different numbers. What matters more is the dating your doctor gives you, because test and scan timings are planned around it.
The weeks are not equal in what you will notice. HealthHub describes weeks 1 to 6 as a time when many women feel fine and a missed period is usually the first sign, while weeks 7 to 12 are when pregnancy hormones “kick in” and symptoms become more obvious.
Your baby’s development in weeks 1 to 12
HealthHub sets out the main milestones:
- Weeks 1 to 6: the embryo implants in the lining of the womb and the key body systems begin to form. By the end of week 6 the embryo is about 4mm long and the heart has begun to beat. A transvaginal ultrasound can pick up the heartbeat at this stage, while an abdominal scan is usually too early to show the baby clearly.
- Weeks 7 to 12: growth is rapid and most major organ systems develop. Limbs and nails form, and the eyelids form and close. By week 12 the baby measures about 6cm from head to bottom. Movements can be seen on a scan, though you will not feel them yet.
Because so much forms early, this is the period when what you take in, including medicines, alcohol and smoke, matters most.
Body changes and common symptoms
HealthHub lists morning sickness, breast tenderness and fatigue as the common symptoms of weeks 7 to 12. KKH’s Healthy Early Life Moments in Singapore (HELMS) programme adds loss of appetite and dizziness. Here is what official sources suggest for each.
Nausea and vomiting
HealthHub’s article on morning sickness says it affects three in four pregnant women, can strike at any time of day, and in most cases settles by around the 12th week. Its tips are to eat small, frequent meals with plain carbohydrates such as bread and crackers, drink plenty of fluids to avoid dehydration, rest well, and avoid triggers such as strong smells.
Severe vomiting is different. HealthHub says to see your doctor immediately if you cannot keep food down or lose more than 10% of your pre-pregnancy weight, and notes that very little or concentrated urine and lethargy are signs of dehydration. Effective anti-vomiting medicines that are safe in pregnancy exist, but always check with your doctor before taking any medicine.
Tiredness, dizziness and sore breasts
The KKH HELMS pregnancy guidance suggests resting when you can while keeping up gentle, regular activity such as walking. For dizziness, get up slowly from sitting or lying down, avoid going hungry or standing for long periods, and seek help if it comes with breathlessness or palpitations. A supportive bra helps with breast tenderness, and any breast lump should be checked by a doctor.
Your first antenatal visits and tests
KKH’s page on caring for your pregnancy says that if you think you are pregnant you can see a doctor at a polyclinic or family clinic, or contact KKH, to arrange your first appointment. HealthHub notes that a doctor can confirm pregnancy at about six weeks. If you have a long-term condition such as diabetes or high blood pressure, or take regular medication, tell your doctor early.
KKH says a healthy woman can expect around 8 to 10 clinic visits over the whole pregnancy, with your blood pressure checked and a urine sample taken each time. In the opening weeks, KKH lists:
- A dating scan to estimate your due date.
- Blood tests for anaemia, thalassaemia, blood group and Rhesus status, antibodies, hepatitis B, syphilis, HIV and rubella immunity.
- Down syndrome screening, which your doctor will explain along with your choices.
KKH also points out that no test is 100% accurate. Ask your doctor what each result means and what the next step would be if anything comes back unexpected. On vaccines, KKH says the flu vaccine can be given safely at any point in pregnancy, while the whooping cough vaccine is recommended later, between 16 and 32 weeks.
Nutrition, supplements and what to avoid
Folic acid
Folic acid is the one supplement almost every early pregnancy guide mentions. HealthHub’s leaflet on antenatal supplements says it is usually taken from before conception until the 12th week, to reduce the risk of birth defects affecting the spinal cord. If you did not start before conceiving, start as soon as you know and ask your doctor or pharmacist about the right dose for you. HealthHub lists calcium and fish oil as supplements usually started from week 12, and iron as one usually taken when blood levels are low, so these are worth discussing at your visits rather than starting on your own.
Eating well
The HELMS guidance recommends folate-rich foods such as green leafy vegetables and citrus fruits, and pairing iron-rich foods with vitamin C to help absorption. If nausea makes proper meals hard, HealthHub’s advice on small, frequent plain meals applies.
What to avoid
- Alcohol and smoking. KKH calls stopping both the best thing you can do for your health and your baby’s.
- Raw or undercooked meat, including sashimi, and raw or partially cooked eggs.
- High-mercury fish such as shark, swordfish and king mackerel.
- Too much caffeine. HELMS suggests no more than one cup of tea or coffee a day.
- Medicines and remedies you have not cleared with your doctor, including traditional and herbal products. HELMS notes that paracetamol is considered safe for headaches in pregnancy, but check with your doctor if headaches persist.
Rest, work and daily life
Tiredness in the early weeks can be striking, and it often arrives before you have told anyone at work. Short rests, earlier nights and regular meals help. If your work involves heavy lifting, long hours on your feet or chemicals, ask your doctor whether any adjustments are advisable.
When to tell your employer is your decision. For leave entitlements later on, MOM’s page on maternity leave links to the eligibility rules and explains how to appeal over a maternity-related dispute.
At home, this is a good time to lighten your load. Strong smells are a common nausea trigger, which makes cooking and cleaning with chemical products harder than usual. Hand over tasks that involve harsh cleaners where you can, keep rooms ventilated, and never mix bleach with ammonia or acidic products, which is dangerous for anyone.
Warning signs that need urgent care
The HELMS guidance is blunt: bleeding is never normal in pregnancy, and in the early weeks it can be a sign of miscarriage. Seek medical help promptly for:
- vaginal bleeding;
- severe abdominal or pelvic pain;
- fever;
- a severe headache or changes in your vision;
- vomiting so severe you cannot keep food or fluids down.
KKH runs an Urgent O&G Centre, a 24-hour walk-in centre at Basement 1 of the Women’s Tower, for urgent problems in pregnancies under 22 weeks, such as abdominal pain and bleeding. KKH advises anyone with significant abdominal pain or heavy bleeding to seek immediate attention there or at the nearest hospital emergency department. If you are seriously unwell, faint, or bleeding heavily, call 995 for an ambulance.
Planning household help early
The early weeks are also a sensible time to think about support for later in pregnancy and after the birth, because good arrangements take time to put together. Some families start with occasional help: our part-time helpers can take on cleaning or home cooking while nausea and tiredness are at their worst. Others plan a live-in helper who will be settled before the baby arrives, and our guide to hiring a maid for newborn care walks through the timeline. When you are ready, our page on live-in help for newborn and confinement care explains how we match helpers for that stage.
Related guides: Nanny or Babysitter in Singapore? Why Families Pick a Helper and Helper Childcare Routine: How Your Maid Can Help Your Family.
Frequently Asked Questions
1st trimester: how many weeks does it last?
HealthHub, in content from the Health Promotion Board, covers the opening trimester as weeks 1 to 12. Some sources count it to the end of week 13, so leaflets may differ slightly. Your doctor’s dating of your pregnancy is what your scan and test schedule will follow, so use that as your reference.
When should I see a doctor after a positive test?
KKH suggests contacting a doctor at a polyclinic or family clinic, or KKH itself, to arrange your first appointment, and HealthHub notes a doctor can confirm pregnancy at about six weeks. See a doctor sooner if you have a long-term condition, take regular medication, or have any bleeding or pain.
Is it normal to have no symptoms in early pregnancy?
Yes. HealthHub says many women feel fine in weeks 1 to 6, and symptoms such as nausea, tiredness and breast tenderness tend to appear from around week 7. Symptoms vary a great deal between women and between pregnancies, so having few of them is not on its own a cause for worry. Raise any concerns at your antenatal visit.
How much coffee can I drink in the early weeks?
KKH’s HELMS guidance suggests limiting tea or coffee to no more than one cup a day during pregnancy. The same guidance advises against having tea or coffee with meals or iron tablets, because they reduce how much iron you absorb.
Where should I go if I have bleeding in early pregnancy?
Contact your doctor promptly. If the bleeding is heavy or you have significant abdominal pain, KKH advises immediate attention at its 24-hour Urgent O&G Centre, for pregnancies under 22 weeks, or at the nearest hospital emergency department. If you feel faint or are seriously unwell, call 995.
Conclusion
The first trimester asks a lot of your body while giving you little outward sign of progress. Focus on the basics official guidance agrees on: start or continue folic acid, attend your first visits and tests, avoid alcohol, smoking, raw foods and high-mercury fish, rest when you can, and know which symptoms need urgent care. Everything else can be worked out with your doctor as you go.
If you would like to talk through help at home during pregnancy or after the birth, our consultants are happy to help. You can get in touch with the Femme5 team to discuss your family’s needs, read more about how we work with employers, or explore what a good placement looks like.
The Femme5 Team
Maid placement specialists, Femme5 Maid Agency
Our consultants work with Singaporean and expatriate families on helper matching, contracts and MOM compliance, and we verify the regulatory guidance in our articles directly against the Ministry of Manpower’s published requirements.
