16 Weeks Pregnant: Everything You Need to Know

Lucy Woodbridge

At 16 weeks pregnant, you’re well into your second trimester, and your baby is growing fast! This is a time of big changes - not just for your little one, but for you, too. You might start feeling more energetic, notice a bigger bump, and even catch yourself instinctively cradling your belly.
16 Weeks Pregnant: Everything You Need to Know

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How Your Baby is Developing at 16 Weeks

Welcome to ’16 Weeks Pregnant: Everything You Need to Know’.

Your baby is now around 11.6 cm long – roughly the size of an avocado – and weighs about 100 grams. Your baby is having a major growth spurt, changing daily, and their tiny body is becoming more defined, with stronger bones and more intricate features. Here’s what’s happening this week:

  • Facial expressions. Your baby is starting to pull faces, though any smiling or frowning is purely reflexive at this stage.
  • Limb movement. They’re making little fists, stretching their arms and legs, and moving more fluidly. From next week onwards, you may begin to feel these flutters!
  • Hardening bones. Their skeleton is strengthening, especially in the legs and spine, helping them prepare for future movement outside the womb.
  • A powerful heart. Their heart is now pumping over 50 pints of blood daily, keeping up with the incredible pace of their development.
16 weeks pregnant symptoms

16 Weeks Pregnant: When are you Actually Due?

Due dates are only an estimate. Statistically, 96% are incorrect. If you are currently 16 weeks pregnant, then you are due in approximately 24 weeks or 165 days. Due dates are calculated at 40 weeks of pregnancy, but your baby might be born between 37 and 42 weeks. Some are born earlier and some later. Put simply, labour happens when your body and baby are ready!

Use our pregnancy calculator to work out when you might be due.

How Your Body Changes at 16 Weeks of Pregnancy

With each passing week, your pregnancy becomes more visible, and your body continues to adjust in remarkable ways. Here are some changes you might notice:

  • A more pronounced bump. Your uterus is growing, and your belly is likely rounding out as your baby takes up more space.
  • Increased blood flow. This means you might see more prominent veins on your skin, particularly on your breasts and legs.
  • Weight gain during pregnancy. By now, you may have gained around 5 to 10 pounds. Remember that every pregnancy progresses differently, and your body is doing exactly what it needs to support your baby.

How to Sleep Comfortably at 16 Weeks Pregnant

Getting comfortable at night can be tricky, but making a few adjustments to your routine can significantly improve your sleep quality. Here are some tips to help you sleep better this week:

Try a pregnancy pillow
Pregnancy pillows are designed to support your growing belly and alleviate strain on your back, hips, and pelvis. Consider using a full-body pillow, a wedge pillow, or a U-shaped pillow, depending on your preferences and comfort needs. These pillows can help distribute your weight evenly, reducing pressure on your joints and allowing you to relax more fully. Placing a pillow between your knees can also help align your hips and reduce discomfort in your lower back.

Adjust your sleeping position
Sleeping on your left side is often recommended during pregnancy, especially after the first trimester. This position promotes optimal circulation, improving blood flow to your uterus, placenta, and baby. It also helps reduce pressure on your liver, kidneys, and other vital organs. If you’re struggling to stay on your left side throughout the night, try propping yourself up with pillows to create a comfortable, stable position that you can maintain while you sleep.

Wind down properly before bed
Creating a relaxing nighttime routine can help signal to your body that it’s time to wind down and prepare for sleep. Consider indulging in a soothing bedtime ritual, like reading a book or listening to calming music or a guided meditation. Avoid stimulating activities, like scrolling on your phone or watching telly too close to bedtime, as screens can make it harder for your mind to settle. A warm bath with Epsom salts can also be a great way to relax your muscles and promote better sleep. Hypnobirthing can help you to find techniques to wind down during pregnancy. 

Can Your Baby Hear at 16 Weeks of Pregnancy?

At 16 weeks, something fascinating happens: your baby can hear sounds for the first time. Their tiny ears are developed enough to pick up muffled noises from the outside world, including the sound of your voice! This is a great time to start chatting to your bump, playing music, or even reading aloud if it feels right. It might seem a little strange at first, but studies suggest that babies can recognise and respond to familiar voices after birth.

16 Weeks Pregnant: Everything You Need to Know

Some pregnancy symptoms start to ease up at this stage, while others might be making their debut. Here are some common symptoms you might experience:

  • Increased appetite. Your metabolism is working harder to support your baby, so don’t be surprised if you feel hungrier than usual.
  • Mild swelling. Fluid retention can lead to swollen ankles or feet, particularly after standing for long periods. Take it easy by keeping your feet elevated when resting and wearing supportive shoes. If at any point you become concerned about swelling, speak to your midwife – they will be able to suggest some remedies, such as compression socks. 
  • Backaches. As your belly expands, it shifts your centre of gravity, which can cause some strain on your lower back. To stay comfortable, be sure to practice good posture where possible, and consider using a cushion behind your lower back when sitting for prolonged periods.
  • Constipation. Slower digestion due to hormonal changes might mean you’re feeling a bit backed up right now. To keep things moving, try increasing your fibre intake and engaging in light exercise such as antenatal yoga.

Less common symptoms include nasal congestion and occasional nosebleeds, which might catch you off guard this week. This can happen due to the increased blood flow you’re experiencing right now, which can cause swelling in your nasal passages. Using a humidifier or a simple saline spray can help ease any discomfort you might be feeling.

Your 16 Week Midwife Appointment

If you haven’t already, you’ll likely have an appointment with your midwife around this time. They’ll check your blood pressure, discuss how you’re feeling, and possibly let you hear your baby’s heartbeat for the first time. Blood and urine tests may also be carried out to monitor your health and screen for conditions like pre-eclampsia.

In Conclusion

At 16 weeks, your pregnancy is in full swing. You’re hopefully past the exhaustion of the first trimester, but not quite into the third-trimester heaviness – it’s a golden time to enjoy your pregnancy. Whether you’re starting to plan your nursery, thinking about baby names, or simply taking it all in, keep trusting your body’s ability to grow your little one. You’re doing brilliantly!

Be sure to check out the Butterbean knowledge hub for your week by week guide to pregnancy plus lots more from birth to babe in arms. Did you know we also have courses? Check out our multi award-winning hypnobirthing and pregnancy yoga courses today!

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  • Evidence-based resources tailored to your needs.
  • Support that evolves with you - from pregnancy to postnatal life.
  • Confidence, clarity, and a sense of calm through every stage.

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