Chorevia

Day 29 of 280 · 4 weeks + 1 day

The missed period

Last reviewed · 3 min read · 6 sources · Plain-text version

A missed period is often the first sign, and the test works better a week after it. Today: how to test, when, and what to do with a positive.

Size this week
about the size of a poppy seed
Length this week
about 2 mm from head to bottom
A woman in a bathrobe sitting on the edge of a bathtub at dawn, looking at her watch, a pregnancy test lying face down on the sink beside her.

Four weeks and one day. Around now a period is due, and a lot of people are standing in a bathroom at six in the morning with a box and its tiny instruction sheet. Today is that minute, done well.

Your baby

A single poppy seed on a plain white ceramic plate, photographed close up in soft window light.

About 2mm long, about the size of a poppy seed, and growing rapidly (NHS). The outer layer of cells will later become the placenta, which provides oxygen and nutrients; for now the embryo is attached to a yolk sac that supplies its nourishment (NHS). The thing the test is looking for is already there: hCG forms when a fertilized egg implants in the uterus, and the level rises each day of pregnancy (OWH).

Your body

A missed period is often the first sign (OWH). The test's timing matters more than its brand: most home tests don't give accurate results one day after a missed period; waiting one week after it usually gives a more accurate result, and if the test is negative, repeat it after a week (OWH). Done at the right time, home tests detect hCG in urine with up to 97% accuracy (NICHD). Some can detect pregnancy from about 3½ weeks (NHS).

Accuracy also depends on when, how, by whom, and which brand (OWH), and some medicines can affect the result (OWH). That is why the steps below are so fussy about the clock.

Try today

  1. The morning test

    Time: 10 minutes, first thing

    1. Test first thing in the morning; it may improve accuracy (OWH).

    2. Follow the box, then wait the full time. Research suggests waiting 10 minutes for the most accurate result (OWH).

    3. Check the control indicator. If it doesn't appear, the test isn't working, whatever else it shows (OWH).

    4. If it's positive, call your doctor right away (OWH); a positive home test is the cue to call and schedule an appointment (NICHD).

    5. If it's negative and your period still hasn't come, test again after a week (OWH).

    Make it work:

    Your doctor can confirm the result with a more sensitive test and a pelvic exam (OWH), so one faint line is enough to make the call.

Watch for

  • Normal

    no symptoms at all (NHS).

    Call your provider

    if you miss a period, even with a negative test; birth control pills, diabetes, PCOS, eating disorders, and certain medications can also stop a period, and it should be checked (NICHD).

  • Normal

    queasiness; nausea can start 2 to 8 weeks after conception and at any time of day (NICHD).

    Go to the ER

    for severe nausea and throwing up, meaning you can't keep fluids down for more than 8 hours or food for more than 24 (CDC).

  • Normal

    a headache before the period is even late (OWH).

    Call your provider

    before taking a medicine for it, to ask whether it's safe (MedlinePlus).

For you

The minute between the test and the result is long. Set the timer and leave the room; the box's answer doesn't change for being watched, and ten minutes is the number (OWH).

Blood tests can detect pregnancy about six to eight days after ovulation, earlier than urine tests (OWH), so if you can't stand to wait a week, that's a question for your provider's office, not a reason to buy a third box.

If you're the partner: ask whether she wants you in the room or on the other side of the door. Then do that, and don't read the stick before she does.

Sources

This guide is general education that summarizes published research and guidance from groups like the American Academy of Pediatrics, the CDC, and the WHO. It isn’t medical advice, and every child develops on their own timeline. Your pediatrician knows your child; if something feels wrong, call them. In an emergency, call 911.

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