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What to do in first trimester: a pregnancy checklist

Learn about the first stage of pregnancy, from first signs of pregnancy to your pregnancy checklist.


teddy bear on the bed

Congratulations! You’re embarking on that magical moment in life – pregnancy. From the first signs of pregnancy to what to expect in the first trimester, let us guide you through this exciting, if slightly nerve-wracking, time! You’ll feel much more confident when you know what to do in first trimester.

Get in touch with your medical professional as soon as you find out you’re pregnant. They’ll help you understand what to expect in the first trimester and will arrange all your tests and appointments.

First signs of pregnancy

So, what are the first signs of pregnancy? There are a few tell-tale signals that will give you an idea that you’re pregnant, even before the official test can confirm it. Here are some of the most common symptoms of pregnancy in first month:

  • Nausea

  • Tiredness

  • Light-headedness

  • Constipation

  • Going off things like coffee/tea/fatty food

  • ‘Metallic’ taste in mouth

  • Increase in vaginal discharge (without irritation/soreness)

  • Light ‘implantation bleeding’ (when the egg attaches to the womb)

  • Changes in your breasts: tender, larger, tingling, veins showing, darker/more pronounced nipples

  • Changes in mood

  • Missed period: the most obvious sign, at the end of the first month

The first trimester: what to expect

Your body will go through some incredible changes in the first three months of pregnancy. Many of the first signs of pregnancy will continue to affect you throughout the first stage of pregnancy. Here’s our guide to what to expect in the first trimester:

  • Emotional changes: pregnancy hormones can make you forgetful, moody or unable to focus.

  • Skin changes: as the body makes extra blood, your veins might become more noticeable, and you might get that ‘glow’. You might also get spots due to an increase in oil. You might want to switch to gentle products for your skin and laundry, like the hypoallergenic and dermatologically tested Comfort Pure Fabric Conditioner and OMO Sensitive – ready for when baby arrives, too!

  • Breast changes: hormones preparing your body for breastfeeding might make breasts tender and swollen, with small bumps around your nipples.

  • Vaginal changes: you might experience thin, white discharge or a little spotting. If you experience vaginal bleeding contact your doctor – if it’s painful or heavy – then go to the emergency department.

  • Bladder changes: you might need to urinate more often or experience constipation.

  • Digestion changes: you might experience heartburn.

First trimester pregnancy checklist

  • There are a few things to sort straight away in the first trimester. Pregnancy lasts a long time, so start off on the right foot to help your whole journey go smoothly. Here’s a handy pregnancy checklist of what to do in first trimester:

  • Make an appointment with your medical professional.

  • Stop smoking and drinking alcohol.

  • Check medication: prescription and over-the-counter medicines.

Find out what foods to avoid: like undercooked eggs, undercooked meat, pâté, liver, game, soft blue cheeses, soft cheeses with white rinds, shark, swordfish and marlin.

  • Reduce caffeine.

  • Find out what activities to avoid: such as contact sports and scuba diving.

  • Find safe pregnancy exercises: like walking, swimming and pelvic floor exercises.

  • Be careful with cleaning products and household chemicals.

  • Research warning signs: such as cramps with bleeding.

  • Take a folic acid supplement: you might want to take extra pregnancy vitamins too.

  • Look up local antenatal classes.

You’ll feel much more confident about the first three months of pregnancy when you know what to expect in the first trimester and what to do in first trimester to keep you and your baby safe and happy. Enjoy this wonderful time!

Key steps

Make the first stage of pregnancy easier by carrying out a few key steps:

  1. Know the symptoms of pregnancy in the first month.

  2. Research what to expect in the first trimester to understand your body’s changes.

  3. Print out a first trimester pregnancy checklist to know what to do and what to avoid.