Early signs of pregnancy: 8 common changes and when to test

Your body feels different and you are wondering whether you might be pregnant. Early signs of pregnancy are often mild, easy to confuse with tiredness or an upcoming period, and not everyone gets all of them. This guide brings together the signs described by the NHS and Mayo Clinic, with when they usually appear, so you know when to test and when to see a doctor.

One thing first: only a pregnancy test, a blood test or an ultrasound can confirm a pregnancy. The signs below are clues, not proof.

The most common early signs of pregnancy

1. A missed period

For people with regular cycles, the NHS describes a missed period as the earliest and most reliable sign. Mayo Clinic suggests that if a week or more has passed without your period starting, you might be pregnant. If your cycles are irregular, or you use contraception that stops your periods, this sign is less useful.

2. Light spotting

Some people notice a little pink or light brown blood, sometimes with mild cramps, around the time their period would be due. Mayo Clinic explains this can happen when the embryo attaches to the lining of the womb, about 10 to 14 days after conception. It is usually very light and should not soak a pad. Many people never have it.

3. Sore, swollen breasts

Breasts may feel bigger, heavier, tingly or tender, with more visible veins and darker nipples. The discomfort often eases after a few weeks as your body adjusts.

4. Unusual tiredness

Feeling exhausted after an ordinary day is common, especially in the first 12 weeks. Mayo Clinic links it to the rapid rise in progesterone.

5. Nausea, with or without vomiting

Often called morning sickness, though it can strike at any time of day. The NHS says most people notice it around weeks 4 to 6 of pregnancy; Mayo Clinic notes it often begins one to two months after conception. Some people never feel sick at all.

6. Needing to pee more often

Your blood volume rises, so your kidneys process more fluid and you may find yourself getting up at night.

7. Changes in taste and smell

A metallic taste, new cravings, going off coffee, tea or fatty food, and a sharper sense of smell are all reported.

8. Other changes

• Constipation.
• More vaginal discharge, without itching or soreness.
• Mood swings.

When to take a pregnancy test

Most home tests work from the first day of a missed period. If you are not sure when your period is due, the NHS suggests testing at least 21 days after you last had unprotected sex. Testing too early is the most common reason for a negative result in someone who is pregnant. Our guide on when to take a pregnancy test goes into detail.

If the test shows positive, it is almost certainly right as long as you followed the instructions. If it is negative and your period still has not arrived, wait a few days to a week and test again.

Symptoms that need a doctor straight away

Seek medical care promptly if you could be pregnant and you have:

• Moderate to heavy vaginal bleeding, or bleeding with tummy pain, cramps or fever.
• Pain low down on one side, shoulder tip pain, or discomfort when peeing or pooing.
• Sudden severe pain, dizziness, fainting or looking very pale.
• Vomiting that will not stop, so you cannot keep food or fluids down.

The NHS notes that symptoms of an ectopic pregnancy usually appear between weeks 4 and 12, and can come before a positive test. Do not wait it out at home with these signs.

Work out your pregnancy week

Once you have a positive test, the next step is knowing how far along you are so you can book your first appointment. Pregnancy is counted from the first day of your last period, so by the time your period is late you are usually already four to five weeks. Our due date calculator gives you an estimate in ten seconds.

If you need a test, browse pregnancy tests ranked by real sales and reviews.

This guide draws on NHS and Mayo Clinic information and does not replace advice from your own doctor or midwife.