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Third trimester: what to expect

Discover what to expect during the third trimester of pregnancy. Get essential insights and expert care at Pregnancy care at Mediclinic Middle East.

14 August 2024
By Mediclinic Middle East

CHANGES IN BABY: WEEKS 29 TO 40

Illustration of a 29-week fetus in the womb showing internal anatomy and fetal positioning.

Week 29

BABY IS ABOUT THE SIZE OF AN ACORN SQUASH WITH BONES FULLY FORMED BUT STILL SOFT AND PLIABLE.

Illustration of a pregnant woman showing a 30-week fetus inside the uterus.

Week 30

BABY IS ABOUT THE SIZE OF A CUCUMBER AND STRONG ENOUGH TO GRASP A FINGER.

An illustration of a pregnant woman's side profile with a visible cross-section showing a fetus in the uterus at 32 weeks gestation.

Week 31-32

BABY IS ABOUT THE SIZE OF A PINEAPPLE, MOVES MOREAND IS LULLED TO SLEEP BY YOUR MOVEMENTS.

Illustration showing a fetus at 34 weeks of pregnancy in the mother's womb, displaying anatomical positioning and surrounding structures.

Week 33-34

BABY IS ABOUT THE SIZE OF A BUTTERNUT SQUASH. THE BONES IN THE SKULL ARE NOT FUSED YET AS THEY NEED TO OVERLAP DURING VAGINAL BIRTH.

Illustration of a fetus in the uterus at 35 weeks of gestation, showcasing the position and anatomical structures.

Week 35

BABY IS ABOUT THE SIZE OF A COCONUT AND HEARING IS FULLY DEVELOPED.

Illustration of a developing fetus curled in the uterus during week 36 of pregnancy, showing anatomical details.

Week 36

BABY IS ABOUT THE SIZE OF A HONEYDEW MELON AND GAINING 227 GRAMS A WEEK. MOVEMENT IS MORE RESTRICTED BUT IMPORTANT TO TAKE NOTE OF.

Illustration of a fetus at 38 weeks gestation curled up inside a uterus, showing the baby's position and surrounding anatomy.

Week 37-38

BABY IS ABOUT THE SIZE OF A PUMPKIN, FULLY FORMED AND IN THE CORRECT, HEAD DOWN, POSITION READY FOR BIRTH.

Illustration showing a fetus in the womb at full-term (around 40 weeks), positioned for delivery.

Week 39-40

BABY IS ABOUT THE SIZE OF A SMALL WATERMELON. ALTHOUGH NOW READY FOR BIRTH, SOME PREGNANCIES CONTINUE UNTIL 42 WEEKS.

CHECKLIST

BOOK A 3D/4D SCAN
This is usually done between 27 and 32 weeks and will be able to identify the baby’s sex. Sometimes the baby’s position can affect imaging, for example, if the legs are crossed, or where the umbilical cord obscures the genital area.

TALK TO YOUR DOCTOR
By week 39 your baby is ready to be born and should be engaged in the pelvis in the head down position. Some babies do not engage and some pregnancies continue until 42 weeks.
In either case, your healthcare provider will discuss birthing options with you.

Make sure you have discussed your birth plan, chosen your paediatrician and considered family planning options for after the birth.

BE AWARE OF BABY’S MOVEMENTS
Focus on feeling them at least twice a day. Babies are often active after you eat or when you are resting. If you notice a change in your baby’s routine and are concerned that movements are becoming less frequent, don’t hesitate to call the obstetrics unit.

PACK YOUR SUITCASE FOR HOSPITAL
Only five percent of babies are born on schedule. Make sure that you have a packed suitcase ready and that it’s in an easily accessible place.

REGISTER YOUR BABY’S BIRTH
You must register your baby’s birth and apply for the Arabic birth certificate. Speak to a member of staff about how we can help with this process.
START WEARING YOUR FEEDING BRA This will ensure comfort and support and limit stretch marks.

TAKE SOME TIME OUT
Consider organising some special activities with friends, family and your partner, as you will soon be spending most of your time with your newborn.

PHYSICAL SYMPTOMS

  • There is no reason you should find sex any less enjoyable and it’s safe till your water breaks or labour starts. Certain positions are more comfortable and pleasurable during pregnancy. Ask your caregiver for advice and discuss any other concerns you may have
  • You may experience a strong urge to start preparing your home for baby’s arrival. This is called the ‘nesting instinct’ and some experts believe it may even trigger labour
  • Sleeping difficulties are common in the third trimester. Use pillows to support your body and relieve pressure

TIPS AND ADVICE

  • If you are experiencing the ‘nesting instinct’ don’t overdo things. Make sure you take time to rest
  • If your partner is going to be present at the birth, make sure you are able to contact him at all times and that he has enquired about his company’s policy on paternity leave
  • During early labour, drink plenty of liquids like water, apple juice or herbal tea and try to eat something, as you might not be able to eat at the hospital until after the birth

Signs of preterm labour
Preterm labour is labour that begins before 37 weeks. Signs can include:

  • Four contractions per hour, which may be painful
  • Bleeding
  • Increased pelvic pressure or pain in the lower back area
  • Bloody mucus discharge or release of the cervical plug or ‘show’

Signs of labour

  • Release of the mucus plug or ‘show’
  • Contractions which become stronger
  • An urge to go to the toilet more often
  • Waters breaking, in a gush or stream

Don’t worry if your waters don’t break.
The membrane will rupture naturally during birth, or can be released by your doctor if required.

TIPS AND ADVICE FOR DADS

DURING THE PREGNANCY

  • Attend antenatal visits so you can follow your baby’s development and feel more connected to your wife and your baby
  • Hormonal changes during and after pregnancy can cause mood swings in mothers-to-be. Listen to your partner and be supportive during these times
  • Try to give your partner a little bit of a break from time to time
  • Do small things for her e.g. massage her feet at the end of the day, run her bath, help with household chores, etc.
  • Suggest and plan opportunities to spend quality time together and discuss feelings and fears
  • Compile a ‘baby budget’. Think about getting financial advice and updating your will

CLOSE TO THE DUE DATE

  • Make sure your suitcase is packed, as you might have to be at the hospital for a while. Include a change of clothes, book or magazine, some energy sweets, etc.
  • Keep your hospital cases together so they’re easy to grab if you need to leave in a hurry
  • Remember your cell phone, camera and relevant chargers
  • Know the shortest and the fastest route to the hospital and make sure you always have a full tank of petrol
  • Reassure your partner that you believe in her and that she will be well cared for in hospital
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