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Your Pregnancy – Week 5

Pregnancy Videos: First trimester

  • Your Pregnancy – Week 1

    Its week 1 of your pregnancy and you are not even pregnant yet, but theres still lots going on. Find out about your first trimester of pregnancy.

  • Your Pregnancy – Week 2

    Why should I take folic acid in the first trimester of my pregnancy? Find out all you need to know about week 2 of your pregnancy here.

  • Your Pregnancy – Week 3

    Am I actually pregnant yet? Find out how your baby is developing in week 3 and get your first trimester pregnancy questions answered.

  • Your Pregnancy – Week 4

    Is it too early to experience morning sickness? Dr Carol Cooper explains the changes occurring in your first trimester and in week 4 of your pregnancy.

  • Your Pregnancy – Week 5

    What are the first signs I’m pregnant? Click here to find out and learn about week 5 of your pregnancy and your first trimester.

  • Your Pregnancy – Week 6

    Is it okay to have a glass of wine now that I’m pregnant? Dr Carol Cooper answers your first trimester pregnancy questions here and explains whats going on at week 6.

  • Your Pregnancy – Week 7

    By week 7 your baby already has a beating heart. Find out more amazing facts about your developing baby during your first trimester here.

  • Your Pregnancy – Week 8

    Your baby may only be 10mm long in week 8 of your pregnancy but he is sending your body into overdrive with all of the pregnancy hormones racing around your body. Find out more about the first trimester of your pregnancy, as well as important advice on ca

  • Your Pregnancy – Week 9

    Suffering with sore and sensitive breasts during your first trimester of pregnancy? Get advice from Dr Carol Cooper on what you can do at week 9 here.

  • Your Pregnancy – Week 10

    What types of cheese should I avoid now that I’m pregnant? Dr Carol Cooper answers your first trimester pregnancy questions here and explains what your baby is doing at week 10.

  • Your Pregnancy – Week 11

    Are antenatal tests harmful to my baby? Click here to learn about week 11 of your pregnancy and what tests to expect during your first trimester.

  • Your Pregnancy – Week 12

    What are the symptoms of miscarriage? Dr Carol Cooper offers information and advice on first trimester pregnancy here, and what to expect at week 12.

Your baby’s first trimester development - week 5

By week five your baby (called an embryo) is roughly the size of a match head. Even so, it has three distinct layers1:

- Ectoderm (outer layer) – this will become your baby’s brain, nerves and skin

- Endoderm (inner layer) – this will become your baby’s organs

- Mesoderm (middle layer) – this will become your baby’s bones and muscles

In week five your embryo will start to take form, developing a head and a tail, which will later become his body1.

What are the first pregnancy symptoms I will get?

In week five your body will be flooded with pregnancy hormones and you should finally get confirmation from a pregnancy test. You may feel some mild abdominal aching as your pelvis begins to prepare for the task of carrying a baby1.

During this week morning sickness starts for many women, although some women will go through their entire pregnancy without any nausea at all. Morning sickness can last all day; it can involve physically being sick or just nausea, and can be triggered by motion or strong smells1.

Try to eat little and often, chew ginger or eat ginger biscuits. Speak to your doctor if you are worried that you’re not able to keep anything down as there are medications which can help with morning sickness1.

Try to remember that morning sickness, however unpleasant, is a sign your baby is growing and thriving.

Around week five of your pregnancy you may also become tired more easily and experience swollen, tender or painful breasts.


Dr Carol Cooper, General Practitioner

Author of Pregnancy Essentials


1. Cooper, C., 2008. Pregnancy Essentials. London: Ryland Peters and Small.


10554 April 2012

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