How big is your baby during each week of your pregnancy? Learn about the size of your unborn baby in comparison to different foods with a week by week baby size chart. Click on each week to learn more about your baby and your body during each week of pregnancy.
Weeks 3 and 4: Poppy Seed
During week 3 and week 4 of pregnancy, your baby is the size of a poppy seed, measuring between 0.014 and 0.04 inches in length.
Week 5: Sesame Seed
During week 5 of pregnancy, your baby is the size of a sesame seed, measuring about 0.05 inches in length.
Week 6: Lentil
During week 6 of pregnancy, your baby is the size of a lentil, measuring between 0.08 inches to 0.16 inches in length.
Week 7: Blueberry
During week 7 of pregnancy, your baby is the size of a blueberry in length, measuring about 0.5 inches.
Week 8: Raspberry
During week 8 of pregnancy, your baby is the size of a raspberry in length, measuring between half (0.5) and one (1) inch.
Week 9: Grape
During week 9 of pregnancy, your baby is the size of a grape, measuring nearly one (1) inch in length and weighing no more than a fraction of an ounce.
Week 10: Kumquat
During week 10 of pregnancy, your baby is the size of a kumquat, measuring a little over one (1) inch in length and weighing no more than a quarter of an ounce.
Week 11: Fig
During week 11 of pregnancy, your baby is the size of a fig, measuring between an inch and a half (1.5) and two (2) inches in length from crown to rump.
Week 12: Lime
During week 12 of pregnancy, your baby is the size of a lime, measuring at just over two (2) inches in length from crown to rump and weighing about half (0.5) an ounce.
Week 13: Peach
During week 13 of pregnancy, your baby is the size of a peach, measuring about three (3) inches in length from crown to rump and weighing just about one (1) ounce.
Week 14: Lemon
During week 14 of pregnancy, your baby is the size of a lemon, measuring about three and a half (3.5) inches from crown to rump and weighing approximately one and a half (1.5) ounces.
Week 15: Apple
During week 15 of pregnancy, your baby is the size of an apple, measuring about four (4) inches in length from crown to rump and weighing about two and a half (2.5) ounces.
Week 16: Avocado
During week 16 of pregnancy, your baby is the size of an avocado, measuring four and a half (4.5) inches from crown to rump and weighing about three and a half (3.5) ounces.
Week 17: Potato
During week 17 of pregnancy, your baby is the size of a potato, measuring five (5) inches from crown to rump and weighing about five (5) ounces.
Week 18: Bell Pepper
During week 18 of pregnancy, your baby is the size of a bell pepper in length, measuring five and a half (5.5) inches from crown to rump and weighing about seven (7) ounces.
Week 19: Tomato
During week 19 of pregnancy, your baby is the size of a large heirloom tomato, measuring six (6) inches from crown to rump and weighing about eight and a half (8.5) ounces.
Week 20: Banana
During week 20 of pregnancy, your baby is the size of a banana in length, measuring six and a half (6.5) inches from crown to rump or ten (10) inches from head to heel and weighing about ten and a half (10.5) ounces.
Week 21: Carrot
During week 21 of pregnancy, your baby is the size of a carrot in length, measuring seven (7) inches from crown to rump or ten and a half (10.5) inches from head to heel and weighing about three-fourths (0.75) of a pound.
Week 22: Spaghetti Squash
During week 22 of pregnancy, your baby is the size of a spaghetti squash, measuring between seven and a half (7.5) and eight (8) inches from crown to rump or eleven (11) inches from head to heel and weighing about one (1) pound.
Week 23: Mango
During week 23 of pregnancy, your baby is the size of a large mango in weight, measuring about eight (8) inches from crown to rump or eleven (11) inches from head to heel and weighing about one (1) pound.
Week 24: Corn
During week 24 of pregnancy, your baby is the size of an ear of corn in length, measuring about eight and a half (8.5) inches from crown to rump or twelve (12) inches from head to heel and weighing one and one-fourth (1.25) pounds. You are in your sixth month of pregnancy.
Week 25: Rutabaga
During week 25 of pregnancy, your baby is the size of a rutabaga in weight, measuring between eight and a half (8.5) and nine (9) inches from crown to rump or thirteen and a half (13.5) inches from head to heel and weighing one and a half pounds.
Week 26: Zucchini
During week 26 of pregnancy, your baby is the size of a zucchini in length, measuring a little over nine (9) inches from crown to rump or fourteen (14) inches from head to heel and weighing between one and two-thirds (1.6) and two (2) pounds.
Week 27: Cauliflower
During week 27 of pregnancy, your baby is the size of a cauliflower in weight, measuring a little over nine and a half (9.5) inches from crown to rump or fourteen and a half (14.5) to fifteen (15) inches from head to heel and weighing about two (2) pounds.
Week 28: Eggplant
During week 28 of pregnancy, your baby is the size of an eggplant, measuring ten (10) inches from crown to rump or fifteen and a half (15.5) to sixteen (16) inches from head to heel and weighing about two and a half (2.5) pounds.
Week 29: Butternut Squash
During week 29 of pregnancy, your baby is the size of a butternut squash in weight, measuring sixteen (16) to seventeen (17) inches from head to heel and weighing just over two and a half (2.5) pounds.
Week 30: Cabbage
During week 30 of pregnancy, your baby is the size of a cabbage in weight, measuring about seventeen (17) inches from head to heel and weighing about three (3) pounds.
Week 31: Pineapple
During week 31 of pregnancy, your baby is the size of a pineapple, measuring between seventeen (17) and eighteen (18) inches from head to heel and weighing almost three and a half (3.5) pounds.
Week 32: Jicama
During week 32 of pregnancy, your baby is the size of a jicama in weight, measuring between seventeen and a half (17.5) and eighteen and a half (18.5) inches from head to heel and weighing about three and three-fourths (3.75) pounds.
Week 33: Durian Fruit
During week 33 of pregnancy, your baby is the size of a durian fruit in weight, measuring between eighteen (18) and nineteen (19) inches from head to heel and weighing about four (4) pounds.
Week 34: Cantaloupe
During week 34 of pregnancy, your baby is the size of a cantaloupe in weight, measuring between eighteen (18) and nineteen and a half (19.5) inches from head to heel and weighing between four and a half (4.5) and four and three-fourths (4.75) pounds.
Week 35: Coconut
During week 35 of pregnancy, your baby is the size of a coconut in weight, measuring between eighteen and a half (18.5) and twenty (20) inches from head to heel and weighing about five and one-fourths (5.25) pounds.
Week 36: Crenshaw Melon
During week 36 of pregnancy, your baby is the size of a Crenshaw melon, measuring between eighteen and a half (18.5) and twenty and a half (20.5) inches from head to heel and weighing about six (6) pounds.
Week 37: Swiss Chard
During week 37 of pregnancy, your baby is the size of a stalk of Swiss chard in length, measuring between nineteen (19) and twenty-one (21) inches from head to heel and weighing about six and one-third (6.3) pounds.
Week 38: Jackfruit
During week 38 of pregnancy, your baby is the size of a jackfruit in length, measuring between nineteen (19) and twenty-one (21) inches from head to heel and weighing about seven (7) pounds.
Week 39: Pumpkin
During week 39 of pregnancy, your baby is the size of a pumpkin, measuring between nineteen (19) and twenty-one (21) inches from head to heel and weighing a little over seven (7) pounds.
Week 40 and Beyond: Watermelon
During week 40 of pregnancy, your baby is the size of a watermelon, measuring between nineteen (19) and twenty-one (21) inches from head to heel and weighing about seven and a half (7.5) pounds.
Image Credits
Poppy Seeds: http://commons.wikimedia.org/wiki/File:Poppy_seeds.jpg
Sesame Seeds: http://commons.wikimedia.org/wiki/File:Sesame_seeds.JPG
Lentils: http://commons.wikimedia.org/wiki/File:Ab_food_15.jpg
Blueberries: http://commons.wikimedia.org/wiki/File:A_Bunch_of_Blueberries.jpg
Green Grapes: http://commons.wikimedia.org/wiki/File:Green_grapes.jpg
Kumquats: http://commons.wikimedia.org/wiki/File:Kumquat-0245.jpg
Figs: http://commons.wikimedia.org/wiki/File:Ficus_carica0.jpg
Limes: http://commons.wikimedia.org/wiki/File:Limes.jpg
Peaches: http://commons.wikimedia.org/wiki/File:Assorted_Peaches_2816px.jpg
Lemons: http://commons.wikimedia.org/wiki/File:Lemons_in_a_swedish_supermarket_ie_fruits_from_citrus_limon.jpg
Apples: http://commons.wikimedia.org/wiki/File:Apples.jpg
Avocados: http://commons.wikimedia.org/wiki/File:Persea_americana_dsc07271.jpg
Potatoes: http://commons.wikimedia.org/wiki/File:Potatoes.jpg
Bell Peppers: http://commons.wikimedia.org/wiki/File:Yellow_and_green_Bell_peppers.JPG
Tomatoes: http://commons.wikimedia.org/wiki/File:Tomaterotgetigert.jpg
Bananas: http://commons.wikimedia.org/wiki/File:Bananas.jpg
Carrots: http://commons.wikimedia.org/wiki/File:Karotten.JPG
Spaghetti Squash: http://www.flickr.com/photos/heathermariekosur/6232573938/
Mangos: http://commons.wikimedia.org/wiki/File:Mangos_in_market.jpg
Corn: http://commons.wikimedia.org/wiki/File:Corncobs_edit1.jpg
Rutabaga: http://commons.wikimedia.org/wiki/File:Swede_-_rutabaga_-_veggiegroup.jpg
Zucchinis: http://commons.wikimedia.org/wiki/File:Courgette_jaune.jpg
Cauliflower: http://commons.wikimedia.org/wiki/File:Courgette_jaune.jpg
Eggplant: http://commons.wikimedia.org/wiki/File:PikiWiki_Israel_12149_Eggplant.jpg
Butternut Squash: http://commons.wikimedia.org/wiki/File:Starr_070730-7821_Cucurbita_pepo.jpg
Cabbages: http://commons.wikimedia.org/wiki/File:Bangkok_Pak_Khlong_Talat_P1100373.JPG
Pineapples: http://commons.wikimedia.org/wiki/File:Pineapple_display.jpg
Jicama: http://commons.wikimedia.org/wiki/File:Pachyrhizus_erosus_2.jpg
Durian Fruit: http://commons.wikimedia.org/wiki/File:Durianfruits_in_Taiwan_-_Summer_2007.jpg
Cantaloupes: http://commons.wikimedia.org/wiki/File:Cantaloupes_Market_1.JPG
Coconuts: http://commons.wikimedia.org/wiki/File:Coconut_123.jpg
Crenshaw Melons: http://commons.wikimedia.org/wiki/File:Melons_in_Freiburg_-_DSC06501.jpg
Swiss Chard: http://commons.wikimedia.org/wiki/File:SwissChard.jpg
Jackfruit: http://commons.wikimedia.org/wiki/File:Jack_fruit,_the_national_fruit_of_Bangladesh.jpg
Pumpkin: http://commons.wikimedia.org/wiki/File:US_Army_52698_Fall_fun_ripe_for_the_picking.jpg
Watermelons: http://commons.wikimedia.org/wiki/File:Watermelons.jpg