Home / Home health monitoring

Pregnancy tests: when to take one and how to pick the right kind

By the Life in Good Form editors. Updated 2026-10-14.

We research products from makers' specs and health sources; we do not run hands-on tests. Links to Amazon may earn us a commission at no cost to you. How this works.

How a home pregnancy test works

hCG stands for human chorionic gonadotropin. A home urine test gives a qualitative result: it checks for the hormone rather than reporting an exact blood concentration. A home result cannot show where a pregnancy is located or whether it is developing normally.

Tests differ in handling and result display. An early-detection label, a large handle and a digital screen describe different buying features; do not treat them as interchangeable measures of accuracy. Compare the directions before buying, particularly if collecting urine, seeing a small window or managing a dropper would be difficult for you.

When to take a pregnancy test

Testing early is a trade-off: you may get an answer sooner, but an early negative is less reassuring. FDA reports that 10 to 20 of every 100 pregnant women may not detect pregnancy on the first day of a missed period. That is a warning about timing, not a ranking of brands.

The Office on Women's Health says waiting a week after a missed period usually improves accuracy. If your cycle is irregular or you do not know when your period is due, ask your clinician about appropriate timing instead of relying on an invented cycle-counting formula. Concerning pain or bleeding needs assessment even without a positive result.

Types of pregnancy test

Compare the number of individually sealed tests, their use-by date and the supplies needed. Do not assume that every midstream model can also be dipped, or that one format always comes with fewer tests. Buy a pack size you expect to use before it expires.

Blood testing is a clinical option. The Office on Women's Health describes quantitative tests that measure the amount of hCG and qualitative tests that check whether it is present. Your clinician decides which test, if any, is useful rather than a home-test shopping guide setting a blood-test schedule.

How to get an accurate result

1. Read before opening. Check the expiration date, sealed packaging, collection method and result diagrams. Choose a well-lit place where you can follow the directions without rushing.
2. Prepare the required supplies. Use a collection cup or dropper only as the kit directs. Keep its instructions beside the test rather than borrowing directions from another brand.
3. Use the specified sample method. FDA notes that first morning urine can improve detection. Follow the product's sampling time, dip limit or drop count.
4. Time the exact reading window. Set a timer for the label's directions. Generic statements about five or ten minutes do not replace the selected product's reading time or final cutoff.
5. Check the control indicator. OWH says a missing required control means the test is not working properly. Do not count that as a negative; follow the kit's invalid-result directions.

Keep the box and instructions if you need to ask the maker or clinician about an unclear result. A photograph taken after the permitted reading window is not a reason to override that window. Do not compare the darkness of lines from different products as a measurement of pregnancy health.

What a positive or negative result means

Positive or unclear. OWH advises contacting your doctor after a positive home result. Follow the result diagram for the particular kit; a faint expected line within its valid window can count as positive. If the display is unclear, ask for help rather than changing the reading rules.

Negative. FDA advises repeating after several days if you still suspect pregnancy. OWH advises calling your doctor after two negative results if you still think you are pregnant. Do not keep buying tests in place of follow-up.

Medicines. OWH notes that some medicines can affect results. FDA's medicine-and-pregnancy guidance advises discussing prescription medicines, over-the-counter products, vitamins and supplements with your health care provider. Do not stop prescribed treatment on your own because a home result is uncertain; get advice about safe use or changes.

Symptoms that need care. NHS advises assessment for possible pregnancy with abdominal pain or bleeding even without a positive test, and prompt advice for shoulder-tip pain. Sudden intense abdominal pain with marked dizziness or fainting needs emergency care. A negative strip must not delay that response.

Pregnancy test vs the glucose test in pregnancy

A pregnancy test looks for hCG. Glucose testing checks blood sugar. NHS describes glucose screening for gestational diabetes as a separate prenatal-care test involving blood samples and a glucose drink. A home pregnancy kit cannot perform that check; follow your own care team's screening and preparation instructions.

If you are tracking your cycle before testing, see our guides to ovulation test strips and the basal body thermometer. Those tools answer different questions too. Do not use an ovulation result as a substitute for a pregnancy test.

What to look for when you buy

Questions people ask

When should you take a pregnancy test?

FDA identifies the most reliable timing as 1 to 2 weeks after a missed period. Follow the test's instructions and seek clinical advice if timing is unclear or symptoms concern you.

Is first morning urine better for a pregnancy test?

It can help detection, according to FDA. It does not remove the risk of an early false negative or replace the selected product's instructions.

Can a blood test detect pregnancy earlier?

Blood tests can detect hCG earlier in some circumstances. Ask your clinician whether testing is needed; a quantitative test measures the amount, while a qualitative test checks whether hCG is present.

Are digital pregnancy tests more accurate than line tests?

Do not infer accuracy from the display format. Choose a result style you can read, and compare the selected test's timing and handling instructions.

What if my test is negative but my period has not come?

Follow the retesting and clinician-contact guidance above. Do not wait to repeat a home test when pain, bleeding, shoulder-tip pain, marked dizziness or fainting needs care.

Sources

• Pregnancy (home use tests) (fda.gov), U.S. Food and Drug Administration
• Knowing if you are pregnant (womenshealth.gov), Office on Women's Health, HHS
• Medicine and Pregnancy (fda.gov), U.S. Food and Drug Administration
• Ectopic pregnancy: Symptoms (nhs.uk), NHS
• Gestational diabetes (nhs.uk), NHS

Sources checked 2026-10-14.