Missed period but a negative pregnancy test: why it happens and what to do

A missed period with a negative pregnancy test has two common causes. You tested before the pregnancy hormone was high enough to show, or something pushed your cycle back this month. KKH's gynae team says to repeat the test in a few days if you still think you're pregnant. If your period still doesn't come, a GP or polyclinic doctor can find out why.

What to do about a missed period and a negative test, step by step

1. Count how late you are. Note the date your last period started and how long your cycles usually run. The ovulation calculator helps you work out where you are in this cycle.
2. Retest in a few days with your first morning urine. KKH's O&G team says to repeat the test in a few days if you still think you're pregnant, and that first morning urine has the most pregnancy hormone in it.
3. Check your timing. KKH's team says the first day of a missed period gives the most accurate result. Our guide on when to take a pregnancy test covers timing and test kits.
4. Think back over the past month. Breastfeeding, stress, sudden weight loss, being overweight, a lot of exercise or hormonal contraception can all make a period late, the NHS says.
5. Write down each period's start date for the next few cycles. A diary or a phone app is enough, and it gives your doctor something to work from.
6. Ask your doctor about a blood test if home tests keep confusing you. KKH's O&G team says blood tests for hCG, the pregnancy hormone, are more accurate and show the actual level.
7. See a GP or polyclinic doctor if your period still hasn't come. KKH's guide says to get checked after more than 3 months with no period, if you're not pregnant.
8. Book sooner if the missed period comes with weight change, tiredness, new hair on your face, or dry or oily skin. The NHS lists these as reasons to see a GP.
9. Start at a polyclinic if you'd like subsidised care at KKH. KKH's charges page says Singapore Citizens and PRs referred from a polyclinic get subsidised rates, and self-referred or walk-in patients pay non-subsidised rates.
10. Go to KKH's Urgent O&G Centre straight away if you have sudden, severe tummy or pelvic pain, feel faint or dizzy, or have pain in your shoulder tip. SingHealth's ectopic pregnancy page lists these as reasons to get help at once, and the centre is open any time.

Why a test can say negative when you're pregnant

A home kit looks for hCG, the pregnancy hormone, in your urine, and KKH's O&G team says it's more than 99 per cent accurate. Timing is the catch: very early on, there may not be enough hCG in your urine for the test to pick up.

Late ovulation moves that timing. KKH's team says a urine test can work from six days after ovulation. If you released an egg later than usual this cycle, your period comes later, and so does the first day a test can turn positive.

Dilute urine can also hide a low level. You can test at any time of day, KKH's team says, but first morning urine is usually the most concentrated.

Two other questions have their own guides. For a faint second line, read faint line on a pregnancy test. For light spotting near your due date, implantation bleeding or period shows how to tell them apart.

Why your period is late if you're not pregnant

SGH's gynae team says a pregnancy test comes first, because pregnancy is the most common reason periods stop. Once that's ruled out, SGH says weight is the most common cause. KKH adds that skipping a few cycles is not usually a cause for concern.

The table pulls together the causes these hospitals and the NHS list, with the clues that point to each one.

SGH says long-term illness, such as thyroid disease or diabetes, can also stop periods. So can the combined pill if it's taken without a break. If you have PCOS and a high weight, SGH says getting back to a healthy weight is likely to make your cycles more regular.

What the doctor will check

A GP will ask about your health, the NHS says, and may do blood tests to find the cause. They may refer you to a gynaecologist or an endocrinologist if you need more tests or scans.

Treatment depends on the cause, so SGH's gynae team starts with checks. They take your height and weight and work out your BMI. You may also have hormone blood tests, including thyroid function, and an ultrasound of the pelvis to look at the womb and ovaries.

Bring your period dates and a list of any medicines you take. KKH suggests a general gynae for further checks, and a polyclinic referral is the route to subsidised rates at KKH. If you're referred, our guide to a first gynae visit covers what the appointment involves.

If you're trying to conceive

A late period and a negative test is a hard month when you're hoping. If you're reading your body for clues, our guides on early signs of pregnancy and having no pregnancy symptoms cover what those signs can and can't tell you.

If your cycles are irregular, our trying to conceive guide covers your fertile window and when to get help. SGH says there are many treatments to help women with PCOS who are trying to conceive. If a later test is positive, the conception date calculator estimates when you conceived.

When to see a doctor

These signs need a doctor. Don't wait on the first two.

• Sudden, severe tummy or pelvic pain, feeling faint or dizzy, or pain in your shoulder tip. SingHealth's ectopic pregnancy page says to get medical help at once.
• Bad tummy pain or heavy vaginal bleeding. KKH says to go to its Urgent O&G Centre or your nearest hospital emergency department.
• Pain low down on one side, or light, irregular bleeding, with a late period. SingHealth lists these as possible signs of an ectopic pregnancy, which grows outside the womb.
• A missed period after a pelvic infection, tube surgery or sterilisation, IVF, or using a contraceptive coil (IUCD). SingHealth says to see a doctor early.
• Heavy periods with giddiness, chest pain or trouble breathing. KKH lists these as signs heavy bleeding may have caused anaemia.
• No period for more than 3 months when you're not pregnant, KKH says, or 3 missed periods in a row, the NHS says.
• A missed period with weight change, tiredness, new facial hair, or dry or oily skin (NHS).
• Periods stopping before 40. KKH says menopause below 40 needs further tests and treatment.

KKH's Urgent O&G Centre at Basement 1, Women's Tower, is a 24-hour walk-in centre. It also sees urgent gynae problems such as heavy bleeding and severe pelvic pain, not only pregnancy. If a later test is positive and your symptoms are mild, KKH's Early Pregnancy Assessment Unit gives same-day appointments on 6294 4050. In an emergency, call 995, SCDF's emergency line. Our guide to bleeding in early pregnancy lists the other hospital routes.

Frequently asked questions

Can I be pregnant with a missed period and a negative pregnancy test?

Yes, if you tested very early. KKH's O&G team says there may not be enough hCG in your urine yet, so repeat the test in a few days. If tests stay negative and your period doesn't come, ask a GP about a blood test, which KKH says is more accurate.

What causes a false negative pregnancy test?

Testing too early, before there's enough hCG in your urine, is the cause KKH's O&G team describes. Dilute urine can hide a low level too, which is why the team suggests first morning urine. If you ovulated late, the first day a test can turn positive moves later as well.

My period is late but I'm not pregnant. Is something wrong?

Usually not. KKH says skipping a few cycles is not usually a cause for concern, and the NHS says most late periods are nothing to worry about. Breastfeeding, stress, weight change, exercise or hormonal contraception is often the reason. See a GP if it keeps happening or you have other symptoms.

No period for 2 months and not pregnant: when should I see a doctor?

KKH's guide says to see a doctor after more than 3 months with no period, if you're not pregnant. You can go sooner if you're worried or have other symptoms, such as weight change or new facial hair. Go to KKH's Urgent O&G Centre at once for severe pain or heavy bleeding.

How long should I wait to retest after a late period and a negative test?

KKH's O&G team says to repeat the test in a few days, with your first morning urine, if you still think you're pregnant. Our guide on when to take a pregnancy test covers timing and kits in more detail.