Pregnancy
Poppy seed to pumpkin: how big is your baby? (photos)
Images: Leigh Beisch for BabyCenter
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How big is your baby?
After talking to our doctors and the greengrocer, we've got a real-world guide that'll give you a new way to answer the question: How far along are you?
Read more about your baby's development week-by-week.
Watch how your baby develops in our Inside Pregnancy videos. -
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Four weeks
Your baby, now officially an embryo, is about the size of a poppy seed.
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 1-9 video. -
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Five weeks
Your baby is about the size of a sesame seed, looking more like a tiny tadpole than a human being.
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 1-9 video. -
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Six weeks
By six weeks, your baby is about the size of a lentil. (Length: 5mm.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 1-9 video. -
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Seven weeks
Your baby, having doubled in size since last week, is about as big as a blueberry. (Length: 1cm.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 1-9 video. -
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Eight weeks
Your baby, now about the size of a kidney bean, weighs 1g and is constantly moving and shifting. (Length: 1.6cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 1-9 video. -
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Nine weeks
Your baby is around the same size as a grape and weighs 2g. (Length: 2.3cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 1-9 video. -
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10 weeks
Your baby, now about the size of a green olive, weighs only 4g. (Length: 3.1cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 10-14 video. -
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11 weeks
Your baby is now about as big as a fig and weighs about 7g. (Length: 4.1cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 10-14 video. -
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12 weeks
Your baby is about the size of a lime and weighs 14g. (Length: 5.4cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 10-14 video. -
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13 weeks
Your baby is almost as long as a pea pod and weighs 23g. (Length: 7.4cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 10-14 video. -
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14 weeks
Your baby, now roughly the size of a lemon, weighs about 43g. (Length: 8.7cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 10-14 video. -
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15 weeks
Your baby has grown to around the same size as an apple and weighs about 70g. (Length: 10.1cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 15-20 video. -
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16 weeks
This week your baby measures up to an avocado in size and weighs 100g. (Length: 11.6cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 15-20 video. -
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17 weeks
Your baby weighs 140g this week, about as much as a turnip. (Length: 13cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 15-20 video. -
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18 weeks
Your baby is nearly as big as a bell pepper and weighs 190g. (Length: 14.2cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 15-20 video. -
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19 weeks
This week your baby is about as large as an heirloom tomato and weighs 240g. (Length: 15.3cm, head to bottom.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 15-20 video. -
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20 weeks
Your baby has grown about as long as a small banana and weighs 300g. (From about 20 weeks your baby will be measured from head to heel. Length: 16.4cm, head to bottom, and 25.6cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 15-20 video. -
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21 weeks
Your baby, almost as long as a carrot, weighs about 360g. (Length: 26.7cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 21-27 video. -
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22 weeks
Your baby is around the size of a spaghetti squash and weighs 430g. (Length: 27.8cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 21-27 video. -
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23 weeks
Your baby weighs about as much as a large mango, just over 500g. (Length: 28.9cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 21-27 video. -
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24 weeks
Your baby is nearly as long as an ear of corn and weighs about 600g. (Length: 30cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 21-27 video. -
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25 weeks
Your baby weighs about the same as the average swede, around 660g. (Length: 34.6cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 21-27 video. -
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26 weeks
Your baby weighs about 760g, as much as a red cabbage. (Length: 35.6cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 21-27 video. -
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27 weeks
Your baby is about as heavy as a head of cauliflower, weighing in at 875g. (Length: 36.6cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 21-27 video. -
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28 weeks
Your baby is close to an aubergine in weight, just over 1kg. (Length: 37.6cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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29 weeks
Your baby is almost the size of a butternut squash and weighs just under 1.2kg. (Length: 38.6cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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30 weeks
Your baby is about as big as a good-sized cabbage this week, weighing in at 1.3kg. (Length: 39.9cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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31 weeks
Your baby now weighs about as much as a coconut, nearly 1.5kg. (Length: 41.1cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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32 weeks
Your baby is taking up more and more space in your womb (uterus), weighs about 1.7kg and is as long as a stalk of kale. (Length: 42.4cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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33 weeks
Your baby weighs almost the same as a pineapple, which is about 1.9kg. (Length: 43.7cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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34 weeks
Your baby is about the size of an average cantaloupe melon, weighing 2.1kg. (Length: 45cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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35 weeks
Your baby, now about as heavy as a honeydew melon at 2.4kg, doesn't have much room to manoeuvre in your tummy. (Length: 46.2cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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36 weeks
Your baby, over 2.6kg and still piling on the weight at a rate of about 30g a day, is close to the size of a romaine lettuce. (Length: 47.4cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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37 weeks
Your baby is about as long as a stalk of Swiss chard and weighs nearly 2.9kg. (Length: 48.6cm, head to heel.)
Find out more about your baby's development this week.
Watch how your baby develops in our Inside Pregnancy: weeks 28-37 video. -
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38 weeks
Your baby, now about as long as a leek, weighs just over 3kg. (Length: 49.8cm, head to heel.)
Find out more about your baby's development this week.
Follow the stages of labour from contractions to birth in our Inside Pregnancy: labour to birth video. -
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39 weeks
Your baby is about as heavy as a mini-watermelon, weighing just under 3.3kg. (Length: 50.7cm, head to heel.)
Find out more about your baby's development this week.
Follow the stages of labour from contractions to birth in our Inside Pregnancy: labour to birth video. -
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40 weeks
Your baby is around the size of a small pumpkin and weighs just under 3.5kg. (Length: 51.2cm, head to heel.)
Find out more about your newborn's development.
Follow the stages of labour from contractions to birth in our Inside Pregnancy: labour to birth video.
![Francesca Whiting Francesca Whiting](/web/20221105170602im_/https://www.babycentre.co.uk/ims/2021/09/Francesca-Whiting-800x800.jpg.pagespeed.ce.W3A4OwEtI_.jpg)
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