Mother and Baby

40 Weeks Pregnant – What to expect

40 weeks pregnant

This week, you’re getting so close to the end of the pregnancy journey and meeting your very own little baby! Find out what’s happening to your baby and to your body now you’ve reached the 40th week of pregnancy. 

How big is my baby at 40 weeks?

Your baby is fully grown and ready to be born now, and is the size of a watermelon. She’ll weigh between six and nine pounds, and will usually measure between 19 and 22 inches, though she could be bigger or smaller once you finally get to meet her.

What’s my baby doing at 40 weeks?

It’s the official end of your pregnancy, but your baby may not realise it yet: around 30% of pregnancies last longer than 40 weeks. Hang in there - it’s nearly time to meet her. While she’s still living inside your tummy, you’re still providing the antibodies she needs to fight infections for the first few months of her life. If you decide to breastfeed, she'll also get more antibodies to boost her immune system, and will get even more from the colostrum that you’ll feed her for the first few days of her life, which is full of antibodies.

Once she’s born, you’ll no doubt first check to see her sex, and whether your little one is a boy or a girl! Once that exciting revelation is over, there is so much to admire: her tiny hands and feet, and of course, her little eyes. Babies at birth can only focus about an inch away, so you may look a little blurry at first, but make sure you talk lots to your little one, as she’ll recognise both yours and your partner’s voice. 

When your baby comes out, you might notice that she’s still curled up in the foetal position. After being in one position for so long, it’ll take a while for your little one to realise she has plenty of room to spread out - plus, it’s comforting for her to be in the foetal pose, as it’s the only position she has ever known. Try swaddling her to remind her of the cosy position she adopted in your uterus. 

What is my body doing at 40 weeks?

The weight of your baby on your cervix will put pressure on the tissues, which helps to thin it (known as ripening or effacing), and open it up ready for birth. If your midwife were to do an internal examination now, she may discover you’re already a couple of centimetres dilated, even if you haven’t had any contractions. 

Your doctor or midwife will also check plenty of other things: they'll do an ultrasound to look at your baby’s breathing movements, muscle tone and overall movement as well as the amount of amniotic fluid that surrounds her, carry out a foetal heart monitoring test and they'll also check your cervix to look at its position, how soft it is, how dilated it is and how effaced it is. 

If you don’t go into labour soon, you’ll likely be induced next week or the week after. 

Common symptoms to look out for:

  • Water breaking: As we mentioned last week, the embarrassing moment when your water breaks in public is mostly the stuff of movies, as most women experience their water breaking while they are already in hospital and in labour. While less than 15% of women experience their water breaking before labour, if you do experience this, whether it’s a gush or a small leak, call your doctor straight away, as it means labour will either begin within 24 hours, or your doctor will start it for you. The water breaking means that the amniotic sac that has been surrounding your baby for the last nine months has ruptured. The amniotic fluid is colourless and odourless, so if your water breaks and you notice any green and brown colours, call your doctor right away, as it could mean that your baby has had a bowel movement in utero.
  • Insomnia: As the big day gets closer than ever, it’s getting harder and harder to get 40 winks. Avoid caffeine and invest in a pregnancy pillow to make nodding off a little bit easier. 
  • Leg cramps: Carrying around all that extra weight is bound to impact your legs, and it may come in the form of unpleasant and painful leg spasms. Flexing your ankles and toes back towards your shin may help alleviate some of the pain. 

What to do this week:

Although you’ve reached 40 weeks’ pregnant, there’s no guarantee that your baby will want to come out just yet. Very few babies arrive on their due date and in reality, she could turn up anytime between weeks 37 and 42. However, if you just can’t wait to meet her, there are a few things you can do to speed the process up. Here are just some of them… 

  • Nipple stimulation: This can release oxytocin, which causes the body to have contractions. Gently rub or roll your nipples, or get your other half to. Alternatively, if it’s not too painful, use a breast pump. However, because this activity can overstimulate your uterus, it’s best to do this when you’re being monitored, rather than trying it at home. 
  • Sex: You may not be up for this right now, but if you’re lucky enough to be in the mood (and some women feel quite rampant), an orgasm can be a contraction trigger. Plus, semen contains prostaglandins which help your body prep for labour. Isn’t biology great? 
  • Stair climbing: You don’t want to totally exhaust yourself (after all, you’ve got labour to come) but climbing up your stairs may help even more than taking a lengthy, tiring walk – possibly because you’re taking bigger steps, and lifting your legs higher which puts more pressure on your cervix.
  • Eat pineapple: There are loads of stories about labour-inducing foods with some women swearing on their vindaloos that spicy foods bring out the baby. Foods that contain basil and oregano or ginger are also said to work, as well as pineapple, as it contains the enzyme bromelain which could help ripen the cervix.
  • Acupressure: Similar to acupuncture, this technique uses fingers on pressure points instead of needles. Try to apply pressure to the roof of your mouth, the webbing of your fingers between your index finger and thumb, and above the ankle – there’s a pressure point around four finger spaces above it.

Take me back to week 39

Take me to week 41

Read next: The top baby names of 2017

Expand Image


​Meaning ‘rest’ and ‘comfort’, this is also a popular biblical name, after Noah builds an ark in the Old Testament, saving animals from a flood.
Expand Image


A name that has been increasing in popularity for the past few years, Isabella is a variation of the more traditional Elizabeth, meaning ‘devoted to God’. 
Expand Image


Meaning ‘estate ruler’. 
Expand Image


An English name meaning ‘whole’ or ‘universal’.
Expand Image


Meaning ‘olive tree’, Oliver is thought to be energetic and good natured. 
Expand Image


Meaning ‘bird’. 
Expand Image


Also a popular girls name, Charlie is a shortened version of Charles, meaning ‘free man’. 
Expand Image


A short version of Maria, meaning ‘wished for child’.
Expand Image


A traditional, biblical, royal name, meaning 'one who follows'. 
Expand Image


Popular in many different languages, in English, Amelia is a variant of Amalia, meaning ‘work’. 
Expand Image


Meaning ‘farmer’, George is a solid, strong and royal choice.
Expand Image


Meaning ‘striving’ and ‘eager’, the name has been popular since the 20th Century and isn’t showing any signs of stopping.
Expand Image


This traditional name means ‘fortified hill’, or in other words, strengthened or protected.
Expand Image


Meaning ‘light’, Ella is often a shortened version of Eleanor or Ellen. 
Expand Image


A super-cute name, made popular by Harry Potter, Albie is a shortened version of Albert, Alban or Albus, meaning ‘noble’ and ‘bright’.
Expand Image


A short version of Beatrice, this super-cute name means ‘she who brings happiness’.
Expand Image


An old English name, originally meaning ‘blonde’. In Irish mythology, Finn is a warrior with supernatural powers, remembered for his wisdom and generosity.
Expand Image


Meaning ‘ruler of the elves’, this vintage name is an alternative to the also popular, Ava.
Expand Image


An old biblical name, meaning ‘Yahweh is God’.
Expand Image


This already popular name saw a spike in the last couple of years, meaning ‘free-man’, it’s now got the royal stamp of approval too.
Expand Image


Benjamin is a traditional biblical name meaning ‘son of the right hand’.
Expand Image


Meaning ‘air’ and ‘lioness’, you’ll have a little warrior in your midst.
Expand Image


Meaning ‘strong’, ‘safe’ and ‘firm’, Ethan is often thought to be someone you can rely on. 
Expand Image


Meaning 'from the flower'. 
Expand Image


Thanks to Alexander the Great, this is now thought of as a noble and mighty name, meaning ‘defending men’. 
Expand Image


Rising in popularity over the past few years, this cute name means ‘moon’.
Expand Image


Meaning ‘brave in war’.
Expand Image


The meanings of this adorable name vary from ‘life’, ‘uncertain’ and ‘beautiful little bird’.
Expand Image


A cute traditional name, meaning ‘bear’.
Expand Image


Meaning ‘dawn’, this name is perfect for parents who are poetry fanatics.
Expand Image


This unusual name means ‘pointy hill’. We also love the cute nickname Monty.  
Expand Image


Meaning 'most holy'.
Expand Image


Meaning ‘estate ruler’, this traditional boy name has been popular for years.
Expand Image


A version of Isabella, this cute name means ‘beautiful’.
Expand Image


Meaning ‘handsome’, this cute baby name is the perfect fit for your beautiful new arrival!
Expand Image


Meaning 'water'. 
Expand Image


A Greek name meaning ‘white warrior’.
Expand Image


Meaning ‘my God is a vow’, we predict this cute name is set to rise this year.
Expand Image


Meaning ‘resolute protector’, this popular, traditional name isn’t going anywhere.

Related content:

© Bauer Media Group

Bauer Media Group consists of: Bauer Consumer Media Ltd, Company number: 01176085,  Bauer Radio Ltd, Company Number: 1394141 Registered Office: Media House, Peterborough Business Park, Lynch Wood, Peterborough, PE2 6EA H Bauer Publishing, Company Number: LP003328 Registered Office: Academic House, 24-28 Oval Road, London, NW1 7DT. All registered in England and Wales. VAT no 918 5617 01

Bauer Consumer Media Ltd are authorised and regulated by the FCA (Ref No. 710067)