Pregnancy week 40: labour, symptoms and what to expect
Manuel FernándezPregnancy Week 40: The Wonderful Journey Reaches Its Climax
Congratulations, dear mum! You have reached week 40 of your pregnancy, a moment you have surely awaited with longing and excitement. This week marks the end of an incredible journey, full of ups and downs, discoveries and unforgettable moments.
At Happymami we are midwives, we support many mums like you and we understand how special and momentous this time is for you.
That is why we want to accompany you through this final stage, giving you all the information, advice and support you need to face the coming days with confidence and love.
Whether you are eagerly awaiting the first signs of labour or simply enjoying the last moments of intimate connection with your baby in the womb, we are here for you. Let's discover together what week 40 has in store for us!
Pregnancy week 40: your baby's development
By the time you reach week 40 of pregnancy, your baby has already been through an amazing transformation, from a tiny cell to a fully formed human being, ready to meet the outside world. Below, we detail the highlights of your baby's development at this stage:
Size and Weight: At 40 weeks, your baby is on average about the size of a small watermelon. Their weight ranges between 2.8 and 4.2 kilograms and they measure approximately 48 to 53 centimetres from head to toe.
Mature Organs: All of your baby's vital organs, including the lungs, are fully developed and ready to work outside the uterus. Their digestive system is also ready to process breast milk or formula.
Foetal Position: Most babies will have settled head down, in the cephalic position, ready for birth. However, some babies may be in a breech or transverse position.
Body Fat: Your baby has built up a layer of fat that will help them regulate their body temperature once they are born.
Lanugo and Vernix: Most of the lanugo, the fine hair that covered their body, will have fallen out, although some may remain on the back and shoulders. The vernix caseosa, a waxy substance that protected their skin, will also have decreased, but traces of it may still be present at birth.
Movements: You will probably notice that your baby's movements are less vigorous due to the reduced space, but you should still feel regular movements. These movements are a sign that your baby is active and healthy.
Reflexes: Your baby has already developed a series of reflexes, such as the sucking reflex, which will allow them to feed once they are born.
Skull Bones: Your baby's skull bones are not yet fully fused, which gives them some flexibility during labour.

Pregnancy week 40: symptoms
By week 40 of pregnancy, you are probably experiencing a mix of emotions, from anticipation and excitement to tiredness and discomfort. Below are the most common symptoms you might be feeling at this stage:
Contractions: You may start to feel more regular and stronger contractions, known as Braxton Hicks contractions. These can be a sign that labour is near, or they may simply be practice contractions.
Changes in Vaginal Discharge: You may notice an increase in vaginal discharge or even the loss of your mucus plug, a jelly-like substance that seals the cervix. Losing the plug can be a sign that birth is approaching, although it can also happen several days before the birth.
Pressure in the Pelvis: As your baby descends and engages in the pelvis, you may feel intense pressure in that area. This can make walking or moving around a little more uncomfortable.
Trouble Sleeping: Discomfort, anxiety and the frequent need to go to the toilet can make sleep difficult.
Swelling: Swelling in the hands and feet is common due to fluid retention. If it is very noticeable, you should consult your midwife.
Fatigue: It is natural to feel tired as the day of birth approaches, especially if sleep is elusive.
Mood Swings: Hormonal fluctuations, together with anticipation and stress, can cause mood swings.
Back Pain: The extra weight and the shift in your centre of gravity can cause pain in the lower back.
Frequent Urge to Urinate: As your baby presses on your bladder, you may feel the need to go to the toilet more often.
Acid Reflux: Your stomach may be compressed due to the size of your baby, which can cause acid reflux or indigestion.
It is essential to listen to your body and rest when you need to. If you experience symptoms such as heavy bleeding, very painful or regular contractions, or a decrease in your baby's movements, it is essential that you contact your doctor, midwife or healthcare professional immediately.
At Happymami we remind you that every pregnancy is unique. It is always important to follow your doctor's recommendations and seek support when you need it. We are here to support you at every step of this exciting journey!
How does the mum-to-be feel at week 40?
By week 40 of pregnancy, the mum-to-be is in a whirlwind of emotions. The anticipation of finally meeting the little being she has carried in her womb for so many months is overwhelming. Every day, every hour, she wonders whether this is the moment when contractions will start, whether today will be the day she finally holds her baby in her arms. This constant expectation can be exciting, but also a little exhausting.

Physically, tiredness and fatigue have intensified. The extra weight of the baby, together with nights interrupted by frequent trips to the toilet or by the search for a comfortable sleeping position, can make her feel constantly exhausted. Every movement takes extra effort, and the feeling of heaviness is constant.
However, along with the tiredness, a feeling of impatience may arise. Although week 40 is the estimated due date, there is no guarantee that the baby will decide to arrive at that exact moment. This wait can create anxiety and make the mum feel on edge, checking every little sensation or change in her body for signs that labour is starting.
On the other hand, hormonal fluctuations continue, and it is not unusual for the mum-to-be to experience mood swings. She may feel euphoric one moment and on the verge of tears the next. It is a period of vulnerability, but also of strength, as she approaches the high point of her pregnancy journey.
At Happymami we understand all these emotions and changes you are experiencing. We want to remind you that you are not alone in this and that every sensation, every emotion, is a natural and beautiful part of the process of becoming a mother.
Week 40 of pregnancy: Happymami tips
Reaching week 40 of pregnancy is an incredible achievement. At Happymami we want you to feel supported and prepared for this very special moment.
First and foremost, it is essential that you listen to your body. At this stage, your body will talk to you and guide you, showing you what it needs. If you feel you should rest, do not hesitate to do so. If, on the other hand, you feel the need to move, walk or even do gentle exercises, follow that impulse. Maternal intuition is powerful and reliable.
It is also a good time to make sure your home is ready to welcome your baby. The peace of mind of knowing that everything is in its place, from the cot to the nappies and the little clothes, will allow you to focus on the birth and the first days with your little one without extra worries.
Although your appetite may have decreased or be irregular, it is crucial to maintain a balanced diet. Nourishing your body with healthy foods and staying properly hydrated will give you the energy and stamina you need to face labour and the first days of motherhood.
Remember that every pregnancy is unique, and the most important thing is that you feel supported and safe. At HappyMami Lactancia we are here to support you at every step of this wonderful journey. We are with you, mum!

Frequently asked questions: pregnancy week 40
What happens if I reach week 40 of pregnancy and I have no pain?
It is completely normal. Not all women feel pain or contractions immediately upon reaching week 40.
Every woman's body and every pregnancy is unique. If you do not experience pain or contractions, it simply means that your body and your baby are not ready for birth yet. It is important to stay in contact with your doctor or midwife to monitor your baby's wellbeing and receive guidance.
What happens if my baby is not born on the estimated due date?
The estimated due date is only an estimate, and many babies are not born on exactly that date. In fact, it is common for first-time mums to go a little past it.
If your baby is not born on the estimated date, there is no reason to worry. Your doctor or midwife will continue to monitor your baby's wellbeing and guide you on the next steps.
How long can it be after the due date?
Generally, if you have not given birth within two weeks after your estimated due date, your doctor may consider inducing labour.
However, this can vary depending on hospital policies, your doctor's opinion and the specific circumstances of your pregnancy.
What symptoms are there in the days before giving birth?
In the days before birth, you may experience symptoms such as your baby dropping into the pelvis, an increase in vaginal discharge or the loss of the mucus plug.
You may also feel irregular contractions, known as Braxton Hicks contractions, which become more frequent and regular as birth approaches. Other symptoms can include bowel changes, a burst of energy or, on the contrary, a feeling of extreme fatigue.
What should I do if my baby is not born at 40 weeks?
If you reach week 40 and your baby has not been born yet, it is essential to stay calm and keep in contact with your doctor or midwife. They will give you guidance and may schedule additional check-ups to make sure that both you and your baby are well. It is important to rest, look after yourself and pay attention to any sign or change in your body.