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Week-by-Week Pregnancy Symptoms: What's Normal and What's Not

Published: March 8, 2026 Reading Time: 18 minutes Author: Sarah Mitchell, RN

Pregnancy is one of the most transformative experiences of your life, and your body will go through remarkable changes over the next nine months. This comprehensive guide breaks down exactly what you can expect week by week, what's perfectly normal, and when you should contact your midwife or GP. Whether you're in your first few weeks or heading towards your due date, understanding your symptoms will help you feel more informed and less anxious about what's happening.

Table of Contents

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First Trimester (Weeks 1-13): The Journey Begins

The first trimester is often called the "invisible pregnancy" because while your body is doing incredible work, there may not be much external change. However, internally, your hormones are shifting dramatically, and you'll likely experience some significant symptoms.

Weeks 1-4: Very Early Pregnancy

What's Normal

  • Missed period: The most telling sign you might be pregnant
  • Tender breasts: Similar to PMS symptoms but may be more pronounced
  • Fatigue: Extreme tiredness as your body works hard on pregnancy
  • Nausea: May start as early as week 2 for some women
  • Food cravings or aversions: Sudden intense preferences or dislikes
  • Frequent urination: Beginning to notice you need the loo more often
  • Mood changes: Feeling emotional or tearful

When to Contact Your Midwife

  • Heavy vaginal bleeding: Soaking through a pad or having clots
  • Severe abdominal pain: Particularly on one side
  • Severe dizziness: Fainting or feeling faint
Weeks 5-8: Morning Sickness Peaks

What's Normal

  • Morning sickness: Can strike at any time of day (despite the name)
  • Increased tiredness: Sleep feels critical now
  • More frequent urination: Get used to knowing where every toilet is
  • Breast changes: They may become larger, darker, and more tender
  • Food aversions: Things you loved may suddenly seem repulsive
  • Heightened sense of smell: Certain odours may trigger nausea
  • Constipation or diarrhoea: Hormonal changes affect digestion
  • Headaches: Often related to hormones and dehydration
  • Mood swings: Feeling tearful, anxious, or irritable

When to Contact Your Midwife

  • Hyperemesis gravidarum: Severe vomiting that prevents you from keeping any food or drink down
  • Vaginal bleeding: Any bleeding should be reported
  • Severe abdominal cramps: Particularly with bleeding
  • Severe headaches with vision changes: Especially if accompanied by high blood pressure
Weeks 9-13: Morning Sickness May Begin to Ease

What's Normal

  • Nausea improving: For many women, symptoms ease after 12 weeks
  • Increased energy: Some women feel a boost as symptoms reduce
  • Weight loss or minimal gain: If morning sickness has been severe
  • Growing breasts: May go up a bra size already
  • Darkening skin: Areolae around nipples may darken
  • Visible veins: Bluish veins may appear on breasts and abdomen
  • Dizziness or lightheadedness: Blood pressure changes and growing womb
  • Leg cramps: Particularly at night

When to Contact Your Midwife

  • Ongoing severe nausea: Not improving by end of first trimester
  • Inability to gain weight: If you're losing weight consistently
  • Persistent headaches: With vision changes or high blood pressure
  • Severe abdominal pain: Or cramping that doesn't ease

First Trimester Survival Tips

  1. Combat morning sickness: Eat small, frequent meals; keep crackers by your bed; ginger biscuits can help; stay hydrated
  2. Deal with fatigue: Nap when you can; prioritise sleep; don't feel guilty about resting
  3. Manage tender breasts: Wear a supportive, comfortable bra; use warm or cold compresses
  4. Handle mood swings: Talk to your partner or friends; exercise gently; be kind to yourself
  5. Reduce toilet visits at night: Limit fluids after 6pm; wear comfortable pyjamas
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Second Trimester (Weeks 14-26): The "Honeymoon" Period

Many women find the second trimester the most enjoyable part of pregnancy. Morning sickness typically subsides, you'll start to show, and you'll begin to feel your baby move. Your energy often returns, and you can finally enjoy pregnancy rather than just endure it.

Weeks 14-18: Energy Returns

What's Normal

  • Relief from nausea: For most women, sickness ends around week 12-14
  • Increased energy: Many women feel like themselves again
  • Improved appetite: After weeks of food aversions, you can enjoy eating again
  • Visible pregnancy bump: Your stomach is starting to show
  • Darker pigmentation: Melasma (dark patches on face) is common; called "chloasma" in pregnancy
  • Thickening hair and nails: Pregnancy hormones make them grow
  • Increased vaginal discharge: Thicker, whiter discharge is normal
  • Nasal congestion: Pregnancy rhinitis is common

When to Contact Your Midwife

  • Green or foul-smelling discharge: May indicate infection
  • Bleeding or spotting: Any vaginal bleeding should be checked
  • Severe abdominal pain: Sharp or persistent pain
  • High fever: Above 38.5°C may need investigation
Weeks 19-22: Quickening - Baby's First Movements

What's Normal

  • Feeling baby move: Described as fluttering, bubbles, or butterfly wings; typically between weeks 16-25
  • Braxton-Hicks contractions: Practice contractions that tighten and release; painless and irregular
  • Stretch marks: Red or purple lines appearing on breasts, belly, or thighs
  • Linea nigra: Dark line running down your abdomen
  • Mild backache: Due to weight gain and posture changes
  • Increased appetite: Growing baby needs more calories
  • Swollen ankles and feet: Fluid retention is normal
  • Varicose veins: May appear on legs or vulva
  • Heartburn: Pregnancy hormones relax the oesophageal sphincter

When to Contact Your Midwife

  • No movements felt by week 25: Discuss if you haven't felt baby move yet
  • Sudden decrease in movements: Change in baby's usual pattern
  • Severe backache: Particularly with other symptoms
  • Severe swelling: One leg significantly more swollen than the other
  • Chest pain or shortness of breath: Contact immediately
Weeks 23-26: Visible and Active Pregnancy

What's Normal

  • Strong baby movements: You'll feel distinct kicks and rolls
  • Increased weight gain: Around 0.5kg per week from now
  • Shortness of breath: Growing womb pushes up on lungs
  • Pelvic pressure: Feel of heaviness in lower abdomen
  • Frequent urination: Womb pressing on bladder
  • Difficulty sleeping: Hard to find comfortable position
  • Swollen hands and fingers: Your wedding ring might be tight
  • Increased vaginal discharge: Continue to be normal and white/cream
  • Occasional leaking of urine: When sneezing or laughing

When to Contact Your Midwife

  • Vaginal bleeding: Especially heavy or with clots
  • Severe abdominal cramps: Regular painful contractions
  • Fluid leaking: Possible rupture of amniotic sac
  • Headaches with vision changes: Could indicate pre-eclampsia
  • Swelling with pain in legs: Could be deep vein thrombosis

Second Trimester Self-Care

  1. Enjoy your energy: This is a great time for maternity photos, travel, or preparing the nursery
  2. Monitor baby movements: Get to know your baby's pattern; you'll notice if something changes
  3. Manage stretch marks: Keep skin moisturised; cocoa butter or oil may help
  4. Ease backache: Good posture, flat shoes, gentle stretching, and swimming are helpful
  5. Combat heartburn: Eat smaller meals; avoid spicy foods; sleep propped up on pillows
  6. Support swollen feet: Elevate legs when sitting; wear comfortable shoes; avoid crossing legs
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Third Trimester (Weeks 27-40): The Home Stretch

The final trimester brings a mix of excitement and physical discomfort. Your baby is growing rapidly, and your body is preparing for labour. Many women find this time both the most uncomfortable and the most real, as you can almost picture meeting your baby.

Weeks 27-30: Baby Getting Bigger

What's Normal

  • Increased Braxton-Hicks: More frequent practice contractions
  • Strong, visible baby movements: You may see your bump move from baby's kicks
  • Increased weight gain: Approximately 0.5kg per week
  • Swelling and puffiness: In face, hands, feet, and ankles
  • Darker areolae: Pigmentation changes continue
  • Frequent urination: Getting worse as baby drops lower
  • Difficulty sleeping: Physical discomfort and baby activity
  • Leg cramps: Especially at night; can be intense
  • Constipation: Common throughout pregnancy, worsening now
  • Haemorrhoids: From constipation and weight of pregnancy
  • Itching: Particularly on stretched areas; can be intense

When to Contact Your Midwife

  • Sudden or severe itching: Particularly on palms and soles; could indicate intrahepatic cholestasis
  • Upper right abdominal pain: With itching or vomiting
  • Decreased baby movements: Change in your baby's pattern
  • Regular painful contractions: Before 37 weeks; could be preterm labour
  • Fluid leaking: Possible rupture of membranes
  • Headaches with vision changes: Swelling in hands/face; could be pre-eclampsia
Weeks 31-34: Slowing Down

What's Normal

  • Breathlessness: Baby is high in your womb, pressing on lungs
  • Increased swelling: Puffiness most noticeable in afternoons and evenings
  • Backache: Severe; can be quite debilitating
  • Pelvic girdle pain: Pain in your pelvis, hips, or lower back
  • Symphysis pubis dysfunction (SPD): Pain in the public bone area
  • Varicose veins: May be more prominent and uncomfortable
  • Reflux and heartburn: Despite antacids, may be worse
  • Sleeping difficulties: Physical discomfort and anxiety
  • Anxiety about labour and birth: Completely normal and common
  • Tingling in hands: Carpal tunnel syndrome from swelling
  • Colostrum leaking: Sticky yellow fluid from breasts

When to Contact Your Midwife

  • Severe headaches: With vision changes or dizziness
  • Severe swelling: Particularly one-sided; could indicate blood clot
  • Calf pain or swelling: May indicate deep vein thrombosis
  • Vaginal bleeding: Any bleeding in third trimester
  • Regular contractions: Before 37 weeks; could be preterm labour
  • Significantly decreased movements: From your baby's normal pattern
Weeks 35-37: Getting Ready for Birth

What's Normal

  • Lightening: Baby drops into pelvis; easier to breathe but more pelvic pressure
  • Increased vaginal discharge: May have a plug of mucus
  • Loose stools: Your body preparing for labour
  • Mild diarrhoea: In the week or two before labour
  • Pelvic pressure and discomfort: More noticeable as baby settles in pelvis
  • Frequent urination: Baby pressing directly on bladder
  • Cramping: Mild, irregular contractions
  • Back pain: Particularly in sacrum
  • Fatigue: Extreme exhaustion is common; body preparing for labour
  • Nesting instinct: Sudden urge to clean and prepare

When to Contact Your Midwife

  • Heavy vaginal bleeding: Soaking a pad or more
  • Severe abdominal pain: Particularly one-sided or constant
  • Severe headaches: With vision changes
  • Chest pain: Any chest pain needs immediate attention
  • Severe swelling: With pain or shortness of breath
  • Sudden decrease in baby movements: Stop what you're doing and count movements
Weeks 38-40+: Labour Could Start Anytime

What's Normal

  • Mucus plug discharge: Thick, gelatinous, may be blood-tinged (show)
  • Braxton-Hicks increasing: Becoming more frequent and stronger
  • Cervical tightening and change: Your body preparing for labour
  • Fluid leaking: May feel small amounts of amniotic fluid
  • Weight loss: Shedding 0.5-1kg as hormones shift
  • Diarrhoea: Common 24-48 hours before labour
  • Extreme fatigue: Your body needing rest before the work ahead
  • Lower back ache: Can be significant
  • Pelvic aching: Intense pressure sensations
  • Emotional changes: Feeling ready, anxious, or emotional
  • Baby "drop": If not dropped already; sudden decrease in heartburn

When to Contact Your Midwife or Go to Hospital

  • Regular contractions: Every 5-10 minutes, lasting 60+ seconds
  • Vaginal bleeding: More than a small amount
  • Fluid leaking: Large gush or consistent trickling
  • No baby movements: For 24+ hours
  • Severe abdominal pain: Particularly between contractions
  • Severe headache or vision changes: With high blood pressure
  • Dizziness or chest pain: Seek immediate medical help

Signs of True Labour vs Braxton-Hicks

True labour contractions: Start in your back and move to the front; become longer, stronger, and closer together; continue regardless of movement or position; may be accompanied by cervical changes.

Braxton-Hicks contractions: Tighten and relax; typically painless or only mildly uncomfortable; stop when you move around or change position; don't progress in intensity.

Third Trimester Comfort Strategies

  1. Manage backache: Pregnancy pillow, good posture, warm baths, massage
  2. Ease pelvic girdle pain: Physio exercises, support belt, avoid wide leg movements
  3. Combat swelling: Elevate legs, cold compresses, compression socks
  4. Help constipation: Increase fibre, drink water, stay active, stool softeners if needed
  5. Sleep support: Pregnancy pillow, darkened room, cool temperature, relaxation techniques
  6. Prepare mentally: Antenatal classes, birth plan, relaxation techniques, partner support

When to Contact Your Midwife or GP

Throughout pregnancy, it's important to know when symptoms warrant professional advice. Your midwife and GP are there to support you and investigate any concerns. Don't worry about bothering them - it's far better to report something and have it checked than to worry needlessly.

Contact Your Midwife or GP During Normal Hours If You Experience:

  • Mild vaginal bleeding or spotting (not heavy)
  • Persistent headaches
  • Severe morning sickness lasting beyond first trimester
  • Suspected urinary tract infection (dysuria, frequency)
  • Swelling that doesn't improve with elevation
  • Mild to moderate abdominal pain
  • Extreme fatigue or dizziness
  • Concerns about baby movements (after establishing a pattern)

Call Your Midwife Out of Hours or Go to Hospital If You Experience:

  • Heavy vaginal bleeding
  • Severe abdominal pain or cramping
  • Regular contractions before 37 weeks
  • Fluid leaking from your vagina
  • Severe or worsening headaches with vision changes
  • Sudden swelling in face, hands, or legs
  • Chest pain or shortness of breath
  • Severe vomiting or inability to keep fluids down
  • High temperature (over 38.5°C)
  • No baby movements for 24 hours (after 16 weeks)

Seek Immediate Emergency Help (999) If You Experience:

Severe chest pain, difficulty breathing, fainting, loss of consciousness, severe uncontrolled bleeding, or any symptom that feels like a medical emergency. Trust your instincts - if something feels seriously wrong, call for emergency help.

Managing Pregnancy Symptoms: Practical Strategies

Morning Sickness (Nausea and Vomiting)

While there's no guaranteed cure, several strategies help many women:

  1. Eat small, frequent meals: Don't skip meals; empty stomach makes nausea worse
  2. Try ginger: Ginger biscuits, ginger tea, or ginger supplements may help
  3. Stay hydrated: Drink water, herbal teas, or squash in small sips
  4. Keep crackers by your bed: Eat a few before getting up
  5. Avoid triggers: Strong smells, stuffy rooms, or certain foods
  6. Get fresh air: A short walk may help settle your stomach
  7. Try pressure bands: Sea-bands worn on wrists; acupressure may help
  8. Rest adequately: Tiredness can worsen nausea
  9. Consider medication: Talk to your GP if food and lifestyle changes don't help; anti-nausea medication is safe in pregnancy

Fatigue

Tiredness in pregnancy is genuine - your body is doing incredible work growing a human:

  1. Rest without guilt: Your body needs it; there's nothing lazy about this
  2. Nap when you can: Even 20-30 minutes can help
  3. Go to bed earlier: Pregnancy sleep needs are real
  4. Share your workload: Ask partner, family, or friends for help
  5. Reduce your to-do list: Let non-essentials go
  6. Eat regular iron-rich foods: Anaemia worsens fatigue
  7. Stay hydrated: Dehydration increases fatigue
  8. Gentle movement: Walking or swimming can boost energy

Backache and Pelvic Pain

Physical support and movement are key:

  1. Use a pregnancy pillow: Supports your bump and back
  2. Improve posture: Avoid slouching; engage your core gently
  3. Wear flat shoes: High heels increase back strain
  4. Avoid lifting heavy items: Bend at knees, not waist
  5. Try warm compresses: Heat on sore muscles can ease pain
  6. See a pregnancy physiotherapist: Can provide tailored exercises
  7. Try massage: Your partner, a friend, or professional therapist
  8. Consider a support belt: Maternity belts can reduce pelvic pain
  9. Swim or do water aerobics: Water supports your weight beautifully

Heartburn and Reflux

Pregnancy hormones relax the oesophageal sphincter, but relief is possible:

  1. Eat smaller meals: Instead of three large meals, eat five or six smaller ones
  2. Avoid trigger foods: Spicy foods, acidic foods, chocolate, caffeine, fatty foods
  3. Sleep propped up: Use extra pillows to elevate your head and shoulders
  4. Don't lie down immediately after eating: Wait at least two hours
  5. Drink milk or eat yoghurt: Can neutralise acid temporarily
  6. Take antacids: Over-the-counter heartburn medication is safe; ask your midwife which brands
  7. Try alginates: Form a protective barrier; often more effective than antacids alone
  8. Wear loose clothing: Tight waistbands worsen reflux

Constipation and Haemorrhoids

Both are common but manageable:

  1. Increase fibre gradually: Whole grains, fruits, vegetables, beans, legumes
  2. Drink plenty of water: At least 8 glasses daily
  3. Stay active: Walking or gentle movement helps
  4. Avoid straining: Don't spend too long on the toilet; straining worsens haemorrhoids
  5. Take stool softeners: Lactulose or other softeners are safe in pregnancy
  6. Try prune juice: Natural gentle laxative effect
  7. For haemorrhoids: Witch hazel pads, warm baths, or special haemorrhoid creams
  8. Avoid iron supplements if possible: They worsen constipation; check if you really need them

Swelling (Oedema)

Common and usually harmless, but watch for warning signs:

  1. Elevate your legs: When sitting, prop feet up on a stool or cushion
  2. Wear compression socks or stockings: Help prevent fluid pooling in legs
  3. Stay cool: Heat worsens swelling; air conditioning or cold water helps
  4. Don't cross your legs: Impedes circulation
  5. Remove tight accessories: Take off bracelets, rings that feel tight
  6. Stay active: Gentle movement improves circulation
  7. Swim: Water supports your weight and reduces swelling wonderfully
  8. Avoid standing for long periods: Sit frequently
  9. Report sudden or severe swelling: Could indicate pre-eclampsia

Sleep Problems

Sleep is precious in pregnancy - here are strategies to improve it:

  1. Go to bed early: You need more sleep; honour that need
  2. Keep your bedroom cool and dark: Optimal sleep environment
  3. Invest in a pregnancy pillow: Makes comfortable positioning easier
  4. Limit screen time before bed: Blue light interferes with melatonin
  5. Relax before bed: Bath, reading, relaxation app, meditation
  6. Try pregnancy yoga or stretching: Reduces discomfort and aids sleep
  7. Avoid caffeine after early afternoon: Increases sleep disruption
  8. Nap during the day: Short naps help compensate for night disruption
  9. Use white noise: Fan or white noise app can help

Remember: Every Pregnancy Is Different

While this guide covers common pregnancy symptoms week by week, remember that every woman's pregnancy is unique. You might experience everything described here, or very little. Some symptoms might last longer or shorter than expected. What matters is that you feel supported, informed, and empowered throughout your pregnancy.

The key to managing pregnancy symptoms successfully is to:

Your antenatal care team is there for you. Don't hesitate to ask questions or report concerns. This is your pregnancy, and you deserve to feel as comfortable and informed as possible.

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Medical Disclaimer

This article is for informational purposes only and should not replace professional medical advice. Pregnancy symptoms can vary significantly between individuals. Always consult your midwife, GP, or healthcare provider for personalised medical advice specific to your pregnancy.

If you experience any concerning symptoms, contact your NHS midwife team, GP, or call NHS 111 for non-emergency advice. In case of emergency, call 999 or go to your nearest hospital A&E.

Information in this article is based on NHS guidance, NICE guidelines, and current best practice in maternity care as of March 2026.