12 Weeks Pregnant: Pregnancy Symptoms & Baby Development
12 Weeks Pregnant: Pregnancy Symptoms & Baby Development
Read time: 4 minutes
12 weeks pregnant: Pregnancy Symptoms & Baby Development
Month 3 (Trimester 1)
Baby development at 12 weeks
Your baby’s brain is continuing to develop.
First scan
If you haven’t already, it’s time to book an appointment for your 12 week scan.
Omegas 3 and 6
Discover how these beneficial fats support the development of your baby’s brain.
Baby development at 12 weeks
What does my baby look like? And, what size is my baby?
At 12 weeks pregnant, your baby is around 6cm in length, having doubled in size in the last 3 weeks alone, and is roughly the size of a plum. Amazingly, your baby is now fully formed, with vital organs, bones and muscles in place, all ready to grow and mature over the coming months.
Your baby’s head is still large compared to their body, but they now have very definite facial features and their eyelids are now visible, although they will remain closed for some time. In their mouth, 20 small buds sit inside the gums, which will eventually emerge as baby teeth.
Pregnancy at 12 weeks (first trimester)
First scan
You are likely to have your first ultrasound scan when you’re around 12 weeks pregnant.
Also known as the dating scan, it allows your midwife to get a more accurate idea of your baby’s due date. It’s often at this time that mums choose to share their news with family, friends and colleagues.
What’s happening in my body?
At 12 weeks pregnant, you could see the beginnings of a baby bump, although this isn’t true for everyone.
Early pregnancy symptoms at 12 weeks
Early pregnancy symptoms vary from person to person. At 12 weeks, you may experience any of the following signs of pregnancy, or no symptoms at all:
Early pregnancy symptoms vary from person to person. At 12 weeks, you may experience any of the following signs of pregnancy, or no symptoms at all:
Focus on Omegas 3 and 6
The fatty acids Omega 3 and 6 support the healthy development of your baby’s brain, and can only be obtained from your diet. Making sure you include good sources of Omega 3 in your diet will help you give your baby the best start for a healthy future.
Making sure you include good sources of Omega 3 in your diet will help you give your baby the best start for a healthy future.
Try these Omega 3-rich snacks and small meals:
- Mackerel on a slice of wholegrain toast
- Grilled salmon with steamed leafy vegetables
- Salmon fishcakes
- A handful of nuts and seeds
- A bowl of wholegrain cereal
THE
SCIENCE
BEHIND
OMEGAS 3 & 6
Omegas 3 and 6 are two types of long chain polyunsaturated fatty acids, collectively called LCPs. One of the Omega 3 LCPs, known as docosahexaenoic acid, or DHA for short, contributes to your baby’s brain development. It also supports the normal development of your baby’s eyes and is associated with development post-birth, specifically normal visual development throughout the first year.
To support your baby’s brain development, try to include DHA each day. Oily fish are an excellent source and eating 1-2 portions of oily fish per week will provide sufficient DHA for you and your baby. However, it’s recommended that you eat no more than two portions per week due to the toxins they may contain. For a healthy intake of other Omega 3 fats on the days you don’t eat oily fish, snack on a handful of nuts or start your day with a bowl of wholegrain cereal.
How much weight should I gain during pregnancy?
Weight gain during pregnancy depends on your pre-pregnancy weight, and varies a great deal from mother to mother. Most women gain between 10kg and 12.5kg (22–28lb) while pregnant, some of which is the weight of the growing baby. Learn everything you need to know about weight gain in pregnancy.
If you haven’t been to see your GP yet, you should make an appointment so they can start planning your antenatal care, including your first ultrasound scan.
Your baby, this week
Discover the science behind your baby's developments, week-by-week
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Questions about feeding and nutrition?
Our nutritionists and feeding advisors are always on hand to talk about feeding your baby. So if you have a question, just get in touch.