Mind, Body, Baby – Third Trimester

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This is the time to really focus on building your relationship with your baby. She or he will be here very soon and if you stroke, talk and sing to her or him now they will already know your voice and recognise your soothing touch when she they’re born.

Nowadays, we know so much more about babies, both in the uterus and at birth. The relationship you forge with your baby when he or she arrives can be a continuation of the connections that you began when you were first pregnant. In this last trimester, your baby is both physically and mentally mature enough to send and receive signals from you and those closest to you. At the start of this trimester, your baby will be at least 26 weeks old, and if she or he were born prematurely, and she or he would undoubtably be communicating with you. So apart from the obstacle of your abdomen, why shouldn’t he or she respond to stimulation from you while still in your uterus?

Using touch and sound

You can use touch and sound to send messages and you can respond to your baby’s movements, too. By interacting with her or him you also strengthen the bond between you. If a sudden, loud noise startles her or him and they kick, you can soothe them with your voice and caress your abdomen. By gently stimulating your body you will not only reinforce your emotional bond, but you may also help your baby’s intellectual development too. By communicating with your baby in the uterus, you can stimulate more connections between the neurons which may boost their intelligence and lessen the risk of the development ADHD. Playing gentle music may help with this too. Music that babies hear repeatedly when they are waiting to be born and which are associated with their mother’s periods of relaxation has been shown to be familiar to them once they have arrived, and importantly, to soothe them if they are distressed.

Chemical messages

It is also clear that while positive experiences such as listening to music, or reading aloud will calm your mind and slow both your heartbeat and your baby’s, if you are under stress yourself, or fearful, the opposite will happen and your baby’s heart will race even faster than yours. Do not be surprised if you feel some frantic kicking when you become angry or anxious. Your baby is reacting to ‘chemical’ messages from you – your stress hormones. Brief upsets that are swiftly resolved will not actually harm your baby, but long-term distress may affect her or his own ability to cope with emotional difficulties and this could have long-term implications. Research has shown that women undergoing prolonged emotional stress during pregnancy tend to have smaller babies who are more likely to cry and more difficult to comfort.


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Now that you’ve arrived at the last third of pregnancy, you may be feeling increasingly tired and perhaps rather large! Concentrate on building your energy resources – your baby will be here very soon. Your pelvis is designed for childbirth, however the way your baby is positioned at the end of your pregnancy will have an impact on the sort of labour you have. Therefore, it is a good idea to try to encourage your baby into a good one.

These days, so many women work right up until a couple of weeks before their due date. But if you are sitting at a computer all day, driving in a car and then slumping on the sofa, exhausted, these positions won’t help to get your baby into the right one. The back of your baby’s body is heavier than the front, so her or his back will tend to roll in the direction you’re leaning in. If you’re leaning back, therefore, her or his back may roll towards yours and will be in a posterior position. If you lean forward, her or his back may roll towards your front – an anterior position. Also, if you can sit with your knees below your hips, it will create more space for the baby’s head to lie in the front of your pelvis.


In this last trimester you will be focusing more and more on the approaching labour and birth of your baby. So you need to change the emphasis of the exercise you take. Building stamina is the key to your routine now.

If your pregnancy is going smoothly, without complications, there is no reason why you should not continue with gentle exercise up until the day that you give birth. However, the key thing to remember is that the exercise really should be gentle, so you need to opt for less-strenuous types of exercise or reduce the intensity of what you do. Yoga can be particularly helpful to your preparations for labour and birth because it will teach you how to focus on your breathing. Swimming too is especially useful because it exercises almost every part of your body and the natural buoyancy of the water makes you feel almost weightless, so there is far less pressure on your back, legs or any aching areas. When sitting, try to avoid lying back and instead sit on your haunches with your chest supported on an exercise ball. This helps encourage your baby to adopt a ‘back to front’ position that can make labour easier.

Aquarobics have been shown to help women get into good psycho-physical condition and deal with pain in labour better.


What your baby senses

In many Eastern philosophies, at the moment that a baby is born, she or he is already considered to be one year old – reflecting the idea that the baby develops as a person before her birth. In the West, we are starting to realise that there is some substance to that idea.

Your baby is already using her or his increasingly sophisticated senses to gather and process information and from as early as 20 weeks their neural network enables them to kick and communicate with you. Gradually her or his senses of hearing, touch, taste, smell and sight are being stimulated by what happens in your body – and by sensations from the outside world. What you do in terms of the food you eat, the rest you take and the way that you react to situations is all transmitted to her or him through the hormones that are released and what they can feel or hear from the outside world. So once your baby is born, she or he will certainly recognise your voice, but they may also find that the foods she receives via your breast milk or the music that you listen to are already familiar to them too.

Your baby, week by week

Your baby is now capable of surviving (with medical assistance) if she or her were born at this point but their remaining weeks in the womb are vitally important for achieving full development. Although your baby looks fully formed at the beginning of this trimester, many of the organs are still developing and will continue to do so even after birth (especially lungs and brain).

Week 28
Your baby can easily raise her or his feet above their head, so you may feel a kick at the top of your abdomen.
Week 29
Your baby’s head is in proportion to the rest of her or his body.
Week 30
You may feel strong kicks under your ribcage and pressure on your pelvic floor as your baby moves into the head-down position for birth.
Week 31
As your abdomen is stretched, more light is let into the uterus and your baby will be more aware of it – her or his pupils will even dilate occasionally.
Week 32
Your baby is sleeping for as much as 90% of the day. She or he can now turn their head and all five senses are functioning.
Week 33
Whatever you do prompts activity or slumber; your baby is lulled by a rhythmic movement as you walk about.
Week 34
Your baby’s movements will be slower because there is much less room. Her or his immune system is developing and by the time they are born they should be able to fight mild infections.
Week 35
The lungs are mature and so a premature baby delivered now is unlikely to suffer breathing difficulties.
Week 36
Your baby’s movements will seem more deliberate now and they are strong, though increasingly constricted.
Week 37
Your baby is now considered full term.
Week 38
Labour may start at any time. Your baby’s immune system is developing and will continue to do so after delivery, when it is boosted by the antibodies and nutrients in the colostrum.
Week 39
Your baby may have swallowed some lanugo via the amniotic fluid. It will form part of the ‘meconium’, the first ‘solid’ waste that he will pass after she or he is born.
Week 40
Your baby will leave the fluid-filled uterus and take her or his first breath of air any time now. Breathing will prompt changes within the heart and arteries that will send the blood supply to the lungs.

At 32 weeks the foetus is about the distance from your elbow to the base of your fingers. At 38 weeks it is about as long as the distance from your elbow to the tips of your fingers

Further reading

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