Congratulations—you’re 39 weeks pregnant! At this stage, your baby is fully developed and ready to meet you. The size of a baby at 39 weeks is similar to a small watermelon. They are approximately 50.5cm from the top of their head to their heel (crown-heel length). Curled up, they are 35.4cm from the top of their head to their buttocks (crown-rump length). They weigh roughly 3.2 to 3.6kg. Their brain and lungs continue to mature, ensuring they’re fully prepared for life outside the womb.
At 39 weeks, gestation is considered full term. The end of pregnancy and the beginning of a new life is near!
For moms, the signs of labour may start to appear, including stronger and more regular contractions, pelvic pressure, or even a show of the mucus plug. It’s important to rest, stay hydrated, and have your hospital bag ready. Let’s dive into what to expect at 39 weeks pregnant and share some last-minute tips to help you feel prepared and confident.
Your baby at 39 weeks
During the last week of pregnancy, your baby has reached more or less what their birth weight will be. Their organs are fully formed and mature enough to work properly outside of the womb. That doesn’t make the final days (or possibly weeks) of pregnancy any less important though.
Here are the key developments and updates of your 39 weeks fetus:
First poo
Did you know that there’s a word for your newborn’s first poo? It’s known as meconium and it’s a thick, dark green substance. It lines their intestines prior to birth and will be released into their diaper in the hours and days after they are born.
Some baby’s release this faecal matter into the amniotic fluid just before birth. If this happens, your baby should be fine. However, they will be monitored closely for complications just in case.
Tear ducts
Your little one will likely make their tiny voice heard often in the form of crying. You won’t see tears right away, though. Their tear ducts won’t fully open until about one month after birth.
Male genitalia
If you’re having a boy, they might be born with testicles that seem proportionately large to their body. This is caused by water retention and hormones. Don’t worry, they will reach an appropriate size soon after birth.
ALSO CHECK OUT: Baby Zodiac Calculator
Your body at 39 weeks pregnant
Being pregnant at 39 weeks is a huge accomplishment. Your baby is considered full-term, which means they are less likely to experience complications after birth. You may be feeling the same symptoms you’ve been dealing with for the past few weeks.
Some new, very important symptoms might also pop up that signal labour is near.
Here are the things to look out for this week:
- Losing your mucus plug. As your cervix opens in preparation for labour, your mucus plug will fall out. You may lose it all at once, or it may be a more gradual process that you don’t even notice.
For some women, this is a sign that labour is hours away. But for others, it could be another few days or even weeks before childbirth starts.
- Bloody show. If your vaginal discharge is tinged with a pink or brownish colour, you may be experiencing your bloody show. This is caused by your cervix dilating and usually means labour is imminent.
- Water breaking. One of the most common signs that labour is near is having your water break. This is caused by your baby’s head putting pressure on the amniotic sac, causing it to pop. It may produce a gush of fluid or just a steady trickle.
If you’re not already experiencing contractions when your water breaks, they should follow within 12 to 24 hours.
- Diarrhoea. Another way your body naturally preps itself for labour is by releasing stool. Emptying your bowels is thought to allow the uterus to work more efficiently.
- Back pain. At this stage in late pregnancy, your back pain could be worse than ever. Although this might just be caused by your large baby bump, it could also be an early sign of labour. If your backaches are accompanied by cramps, make sure to check in with your health care practitioner right away.
Taking care of yourself during week 39 of pregnancy
The lead up to giving birth can bring about a whole host of emotions. You might be feeling excited, anxious, worried – or all three! To help you feel more prepared, and hopefully less stressed, here are some things to focus on this week.
- Think about hospital snacks. Don’t forget to pack some snacks in your hospital bag. Labour is a tough ordeal, and you don’t know how long you’ll be in it for. Nutritious foods that give you energy are your best bet. Here are some ideas for easy to eat snack items:
- – Granola/breakfast bars
– Fresh fruit, like apples, pears, grapes, and bananas
– Dried fruit, like mango, raisins, and banana chips
– Crackers
– Rice cakes
– Trail mix - Buy nursing bras. If you’re planning to breastfeed your baby, nursing bras will make your life a lot easier. They’re different from regular bras in that they have special panels and clasps that allow easy access to your nipples.
A good nursing bra should fit comfortably. You don’t want it too tight, as this can cause issues with your milk supply and flow.
- Stay active. Getting up and moving around might be the last thing you want to do at 39 weeks pregnant. However, staying active is very beneficial for both you and baby.
Although it hasn’t been medically proven, walking is thought to help bring on labour. It aids gravity in pushing your baby’s head further down your pelvis and onto your cervix. It’s this pressure that can help start dilation.
Swimming is another great activity to enjoy late in pregnancy. It’s gentle on your body and will help take the pressure off of your joints.
FAQ’s: 39 Weeks Pregnant – Baby’s Growth & Labour Prep Tips
What physical changes might I notice in the last week or so before labour?
Some mums experience more frequent Braxton Hicks contractions, pelvic pressure as the baby drops lower, and possible changes in discharge. You could also feel heightened aches and pains as your body prepares for delivery.
Why might my healthcare provider discuss induction at 39 weeks?
Induction at 39 weeks may be offered if there are medical concerns like high blood pressure, reduced fetal movement, or potential complications. Some doctors also discuss elective induction if the pregnancy is healthy, but it’s crucial to weigh the pros and cons.
Can I still work at 39 weeks pregnant?
It depends on how you feel and what your job entails. Many opt to start maternity leave around this time due to fatigue and the unpredictability of going into labour. Listen to your body and discuss options with your employer and healthcare provider.
How do I know if my waters have broken or if it’s just discharge?
Amniotic fluid is typically clear and watery, and you may notice a trickle or a gush. If you’re unsure, place a sanitary pad and note the colour or odour. Contact your midwife or doctor if you suspect your waters have broken, as they’ll want to assess you and your baby.
Is it normal to feel restless or impatient as my due date approaches?
Yes, many mums experience impatience or anxiety, especially if they’re eager to meet their baby or feeling physically uncomfortable. Staying active, talking to friends and family, and doing calming activities can help channel that restlessness more positively.
What about perineal massage? Is it still beneficial at 39 weeks?
Perineal massage may help prepare the birth canal by improving the elasticity of the perineum. Even if you’re close to labour, regular gentle massage could reduce the likelihood or severity of tearing. Always follow your midwife or doctor’s guidelines on technique.
Are there ways to encourage labour naturally at 39 weeks?
Some parents try walking, bouncing on a birth ball, or gentle stretching. However, effectiveness varies, and there’s limited evidence of success. It’s best to discuss any methods with your healthcare provider, especially if you have specific medical considerations.
Should I have finalised my birth plan by now?
Ideally, yes. By 39 weeks, most expectant parents have shared their preferences for pain management, birthing positions, and potential interventions with their healthcare team. Keep in mind that labour can be unpredictable, so flexibility is key.
How can I prepare emotionally if my birth plan changes unexpectedly?
Talk through various scenarios with your midwife or doctor—such as an unplanned caesarean or pain relief options—so you’re aware of possible adjustments. Building a supportive network of friends or family can also provide emotional reassurance and help you adapt if plans change.
Is it safe to keep exercising at this stage?
Most women can continue mild activities like walking, swimming, or prenatal yoga if there are no complications. Exercise can improve circulation, reduce stress, and help you manage weight. Always confirm with your healthcare provider if it’s suitable for you.
What if I’m feeling little or no early signs of labour yet?
It’s completely normal. Some people don’t show strong pre-labour signs until labour actually begins. Continue monitoring your baby’s movements and stay in contact with your healthcare provider. They can advise on next steps if you go past your due date.
Disclaimer: The information above is intended as a general guide and should not replace personalised medical advice. Always consult your midwife or doctor for advice specific to your pregnancy and health.
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