Poppyseed to pumpkin: how big is your baby? (photos)

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  Karla Martin 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 barely the size of a kumquat, 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 capsicum 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 length of a cucumber 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 a large eggplant 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 pumpkin 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 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 uterus (womb) and is about 42.4cm head to heel, as long as bunch of celery (weight 1.7kg).
  
  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 rockmelon (cantaloupe), 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, but will still move a lot. (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 as long as a large cos 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 rainbow 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 and birth video.
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  40 weeks

  Your baby is around the size of a small pumpkin and weighs about 3.3kg. (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 and birth video.

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