Pregnancy due date calculator and week-by-week guide for Malaysia

Due date calculator

Enter the first day of your last period and your usual cycle length. The calculator shows your estimated due date, how many weeks pregnant you are, and when key check-ups fall.

First day of your last period Usual cycle length21 days22 days23 days24 days25 days26 days27 days28 days29 days30 days31 days32 days33 days34 days35 days36 days37 days38 days39 days40 days41 days42 days43 days44 days45 days Calculate

Worked out in your browser: nothing you enter is stored or sent. An early pregnancy scan gives the most accurate due date.

How your due date is worked out

• From your last period: the standard method counts 280 days (40 weeks) from the first day of your last menstrual period. This assumes a 28-day cycle, with ovulation around day 14. If your cycles are usually longer or shorter, the calculator shifts the date by the difference.
• From an early scan: an ultrasound in the first trimester, which measures the baby, is more accurate. If it differs from the date based on your period by more than about a week, doctors usually go by the scan. The Ministry of Health’s perinatal manual says scan dates should be set before 22 weeks.
• After IVF: the due date is set from the embryo transfer date: 261 days after a 5-day embryo transfer, or 263 days after a 3-day transfer.

A due date is an estimate. Pregnancy normally lasts between 37 and 42 weeks, and few babies arrive on the exact day.

If your periods are irregular, you stopped the contraceptive pill recently, or you aren’t sure of the date, your doctor will arrange a dating scan.

Pregnancy week by week in Malaysia

Antenatal care in Malaysia

When and where: register at your nearest Klinik Kesihatan, or with a private doctor, as soon as possible, preferably before 12 weeks. Government clinics give you a pink antenatal record book (Buku Rekod Kesihatan Ibu). Bring it to every appointment, including private ones and when you go into labour.

How many check-ups: under the Ministry of Health’s Perinatal Care Manual, a healthy first pregnancy has around 10 visits: before 12 weeks, at 16–20, 24–26, 28–30, 32–34 and 35–36 weeks, then weekly from 37 to 40 weeks. Later pregnancies have around 8. You will have more if you have a higher-risk pregnancy.

Colour codes in the pink book: government clinics tag each pregnancy by risk. White means no risk factors, green is followed up by a clinic doctor, yellow needs a specialist, and red needs immediate referral to hospital.

Tests at your first visit usually include:

• Blood pressure, weight and a urine test for protein and sugar
• Haemoglobin, blood group and Rhesus type
• Screening for syphilis and HIV, and for hepatitis B where indicated
• Thalassaemia screening if your red blood cells are small. If you are a carrier, your husband is tested too. See our thalassaemia guide.

Diabetes in pregnancy: you’ll be offered a glucose tolerance test if you have risk factors, such as a BMI over 27, diabetes in a close relative, a previous baby weighing 4 kg or more, or diabetes in a previous pregnancy.

Folic acid, iron and vaccines

• Folic acid: 400 micrograms a day, ideally from 3 months before you conceive until at least 12 weeks of pregnancy, to lower the risk of spina bifida. Women with diabetes or a previous baby with a neural tube defect need a higher 5 mg dose from their doctor.
• Iron: anaemia is common in pregnancy in Malaysia, and antenatal clinics routinely give iron supplements.
• Whooping cough (Tdap): free at Ministry of Health clinics since May 2025, given at 28 to 32 weeks. It passes protection to your baby, who is too young to be vaccinated in the first weeks of life.
• Flu vaccine: recommended in pregnancy by the Ministry of Health. See our flu vaccine guide.

Early signs of pregnancy and when to test

Common early signs, usually from 4 to 6 weeks, include a missed period, light spotting, nausea or vomiting, tiredness, sore breasts, needing to pass urine more often, and a metallic taste.

Home pregnancy tests are most reliable from the first day of a missed period. If you don’t know when your period is due, test at least 21 days after unprotected sex. A positive result is almost certainly correct. A negative result is less reliable, so test again a few days later if your period still hasn’t come.

Ectopic pregnancy (hamil luar rahim)

In an ectopic pregnancy, the fertilised egg implants outside the womb, usually in a fallopian tube. It affects about 1 in 90 pregnancies and can’t continue safely. Symptoms usually appear between 4 and 12 weeks:

• Pain low down in the tummy, often on one side
• Vaginal bleeding or a brown, watery discharge
• Pain in the tip of the shoulder
• Discomfort when passing urine or opening your bowels

Risk factors include a previous ectopic pregnancy, pelvic infection, tubal surgery, IVF, becoming pregnant with a coil (IUD) in place, smoking and being over 35.

Warning signs later in pregnancy

A fever in pregnancy can also be dengue, which needs prompt assessment. See our guide to dengue warning signs.

Pregnancy in Malaysia: the numbers

Malaysia recorded 396,175 live births in 2025, 4.5% fewer than in 2024, and the fertility rate fell to a record low of 1.5 children per woman, according to the Department of Statistics. Maternal deaths fell to 20.4 per 100,000 live births in 2025, from 24.3 in 2024.

Under the Employment Act, working mothers are entitled to 98 days of maternity leave, and married fathers to 7 days of paid paternity leave, subject to conditions.

Where to start antenatal care

Your nearest Klinik Kesihatan provides antenatal care and the pink antenatal book. Many private GP clinics can confirm a pregnancy, arrange early blood tests and refer you to an obstetrician. Our directory lists GP clinics across Kuala Lumpur, Selangor and other states.

Browse the clinic directory

Frequently asked questions