---
title: 'What Are The Common Early Symptoms of Pregnancy?'
slug: early-pregnancy-symptoms-first-trimester
lifeStage: pregnancy
category: Wellbeing
author: 'Samaira Farid'
medicalReviewer: 'Dr Shree Datta, Consultant Obstetrician and Gynaecologist '
reviewerId: 'https://blog.bloume.com/pregnancy/medical-board.md#dr-shree-datta'
lastUpdated: '2026-08-29'
primarySource: 'Bleeding and/or pain in early pregnancy'
wordCount: 980
readTimeInSeconds: 245
---

# What Are The Common Early Symptoms of Pregnancy?

The first trimester covers the first 12 weeks of pregnancy and brings a wave of physical changes driven by fast-shifting hormones. Tiredness, nausea, breast tenderness, and mild cramping are all common early pregnancy symptoms in the first trimester. This article walks through what is happening in your body, which sensations are typical, and when to contact a midwife, GP, or emergency services.

**Q: What are the most common early pregnancy symptoms in the first trimester?**
A: The most common early pregnancy symptoms in the first trimester include a missed period, nausea and vomiting that can hit at any time of day, deep tiredness, tender and fuller breasts, needing to wee more often, constipation, bloating, a metallic taste in your mouth, and a sharper sense of smell. Mild cramping is common too. Symptoms vary a lot from one person to the next, and not having a particular one does not signal a problem.

Early pregnancy symptoms can arrive quickly and feel unfamiliar, even if you have experienced premenstrual symptoms before. Deep tiredness, nausea at any hour, and breast tenderness that feels different from your usual premenstrual ache are among the most common, and all of them are your body responding to a fast hormonal shift that begins within days of conception. The first trimester covers the start of pregnancy through to the end of week 12.

## The hormones behind early pregnancy symptoms

Much of what you feel early on traces back to one hormone. Soon after conception, your body starts producing human chorionic gonadotropin (hCG), often called the pregnancy hormone. Its levels climb fast in early pregnancy, peaking at around nine weeks. That rapid rise drives a lot of the symptoms you feel in the first trimester, nausea included.

Oestrogen and progesterone both climb steeply during early pregnancy. Progesterone softens the muscles of your womb so it can expand, keeps the pregnancy going until the placenta takes over, and relaxes the muscles of your digestive tract (which is part of why bloating and heartburn can creep in). At the same time, rising oestrogen works alongside progesterone to increase blood flow to the womb, support the growing uterine lining, and prompt structural changes throughout your body. Together, these hormonal shifts drive early physical symptoms while creating the environment your pregnancy needs to thrive.

## What is normal in the first trimester?

Nausea and vomiting, often called morning sickness, affect up to 80% of pregnant women. The name is misleading, because it can catch you at any time of day or night. It usually starts somewhere between weeks four and seven, and for most people eases by around 20 weeks.

### Other physical changes you may notice

Beyond nausea, plenty of other changes are typical in the first trimester:

- Tender, larger breasts
- Needing to wee more often
- Constipation
- Changes in vaginal discharge
- A metallic taste in the mouth
- A sharper sense of smell
- Food cravings and aversions

Not noticing a particular symptom on this list does not signal a problem. Every pregnancy is different, and which symptoms show up, and how strongly, varies widely.

## Where the pain tends to be in early pregnancy

Mild stomach cramps, sometimes described as period-like pains or growing pains, are common early on. They can come from ligaments stretching to support your growing womb, from constipation, or from trapped wind, and usually ease when you rest or change position. 

However, if the pain is severe, persistent, or accompanied by bleeding, seek medical advice promptly. Severe or prolonged pain in early pregnancy can be a sign of complications such as an ectopic pregnancy, a threatened miscarriage, or an ovarian cyst issue that needs urgent assessment.

## When to seek support

If you are being sick constantly and cannot keep any food or fluid down, call your GP or midwife. This can be a sign of hyperemesis gravidarum (HG), a severe form of pregnancy sickness that affects up to 3 in 100 pregnant women and sometimes needs hospital treatment. HG can start before 20 weeks and is different from typical morning sickness. 

If nausea and vomiting are wearing you down, your GP or midwife can offer support, reassurance, and advice on food and fluids. Where medication is needed, they may suggest antihistamines as a first option.

Call your midwife, GP, or an early pregnancy unit if you have stomach pain alongside any of these:

- Vaginal bleeding or spotting
- Regular cramping
- Unusual vaginal discharge
- Pain when urinating
- Severe pain that does not ease with rest

> **WARNING**: An ectopic pregnancy is a medical emergency. It happens when a fertilised egg implants outside the womb, most often in a fallopian tube, and affects around 1 in 90 pregnancies in the UK. Signs include pain low in your abdomen (often on one side), vaginal bleeding that differs from a normal period, and sometimes pain at the tip of your shoulder. If you notice these, call 999 or go to your nearest A&E straight away.

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**Q: What are the most common early pregnancy symptoms in the first trimester?**

The most common early pregnancy symptoms in the first trimester include a missed period, nausea and vomiting that can hit at any time of day, deep tiredness, tender and fuller breasts, needing to wee more often, constipation, bloating, a metallic taste in your mouth, and a sharper sense of smell. Mild cramping is common too. Symptoms vary a lot from one person to the next, and not having a particular one does not signal a problem.

**Q: Where is the pain usually felt in early pregnancy?**

Mild cramps low in your abdomen are common in early pregnancy, and usually come from ligaments stretching to support your growing womb, from constipation, or from trapped wind. The pain tends to feel like period pain or a dull ache, and often eases when you rest or change position. Pain that is severe, one-sided, or comes with vaginal bleeding needs prompt medical attention, since it can be a sign of something more serious such as an ectopic pregnancy.

**Q: What is stage one of pregnancy?**

Stage one, the first trimester, runs from the start of pregnancy through to the end of week 12. It is an important time for your baby's development. During these weeks your body produces rising levels of hCG and progesterone, and these hormones drive many of the physical changes and symptoms you feel.

**Q: When should nausea in pregnancy prompt a call to a GP or midwife?**

If you are being sick constantly and cannot keep any food or fluid down, call your GP or midwife soon. This may be hyperemesis gravidarum (HG), a severe form of pregnancy sickness that affects up to 3 in 100 pregnant women and can need hospital treatment. Your GP or midwife can check your symptoms and talk through the next steps, which may include medication.

### Clinical Sources
- [Bleeding and/or pain in early pregnancy](https://www.rcog.org.uk/for-the-public/browse-our-patient-information/bleeding-andor-pain-in-early-pregnancy/)
- [Week-by-week guide to pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/)
- [Week 9 - Your pregnancy and baby guide](https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/1st-trimester/week-9/)
- [Week 9 - Your pregnancy and baby guide](https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/1st-trimester/week-9/)
- [Pregnancy sickness (nausea and vomiting of pregnancy and hyperemesis gravidarum)](https://www.rcog.org.uk/for-the-public/browse-our-patient-information/pregnancy-sickness-nausea-and-vomiting-of-pregnancy-and-hyperemesis-gravidarum/)
- [6 weeks pregnant guide](https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/1st-trimester/week-6/)
- [Stomach pain in pregnancy](https://www.nhs.uk/pregnancy/common-symptoms/stomach-pain/)
- [RCOG Green-top Guideline No. 69](https://www.rcog.org.uk/media/y3fen1x1/gtg69-hyperemesis.pdf)
- [Stomach pain in pregnancy](https://www.nhs.uk/pregnancy/common-symptoms/stomach-pain/)
- [Ectopic pregnancy](https://www.rcog.org.uk/for-the-public/browse-our-patient-information/ectopic-pregnancy/)

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Reviewed by Dr Shree Datta, Consultant Obstetrician and Gynaecologist | [Medical Board](https://blog.bloume.com/pregnancy/medical-board.md) | August 2026