Your Weekly Fruit Guide to Baby Sizes During Pregnancy
- Aug 1
- 4 min read
Pregnancy is a journey filled with wonder and anticipation. One of the most exciting parts is watching your baby grow week by week. To help you visualize this amazing process, many parents find it fun and helpful to compare their baby’s size to familiar fruits. This guide takes you through each week of pregnancy, showing how your baby’s size matches up with different fruits. It’s a simple way to connect with your growing baby and track progress in a relatable way.
Weeks 1 to 4: The Beginning – Poppy Seed to Sesame Seed
In the earliest weeks, your baby is tiny, starting as a fertilized egg and then becoming a blastocyst. By week 4, the embryo is about the size of a poppy seed or a sesame seed. At this stage, it’s hard to imagine the growth ahead, but this tiny seed is the foundation of your baby’s development.
Week 1-2: Fertilization and implantation occur.
Week 3: The embryo is about the size of a poppy seed.
Week 4: The embryo reaches the size of a sesame seed, roughly 1/10 of an inch.
Weeks 5 to 8: From Lentil to Raspberry
By week 5, your baby is growing rapidly. The heart begins to beat, and basic facial features start to form. The size comparison moves from a lentil to a raspberry by week 8.
Week 5: Baby is about the size of a lentil, around 0.13 inches.
Week 6: Size of a sweet pea, approximately 0.25 inches.
Week 7: Blueberry size, about 0.5 inches.
Week 8: Raspberry size, nearly 0.63 inches.
This period marks the start of major organ development, so the size increase is impressive.
Weeks 9 to 12: From Grape to Lime
As the first trimester ends, your baby grows from the size of a grape to a lime. This is when your baby’s features become more distinct, and movements begin.
Week 9: Grape size, about 0.9 inches.
Week 10: Kumquat size, roughly 1.2 inches.
Week 11: Fig size, around 1.6 inches.
Week 12: Lime size, approximately 2.1 inches.
By week 12, your baby is fully formed with fingers, toes, and even tiny fingernails.
Weeks 13 to 16: From Peach to Avocado
Entering the second trimester, your baby’s size grows from a peach to an avocado. This stage is exciting as many parents start to feel the baby’s movements.
Week 13: Peach size, about 2.9 inches.
Week 14: Lemon size, around 3.4 inches.
Week 15: Apple size, approximately 4 inches.
Week 16: Avocado size, nearly 4.6 inches.
Your baby’s body is growing faster than the head now, and the skin is still translucent.
Weeks 17 to 20: From Onion to Banana
By mid-pregnancy, your baby is about the size of an onion and then a banana. This is when many parents have their anatomy scan ultrasound.
Week 17: Onion size, about 5 inches.
Week 18: Sweet potato size, roughly 5.6 inches.
Week 19: Heirloom tomato size, around 6 inches.
Week 20: Banana size, approximately 6.5 inches.
Your baby’s senses are developing, and they can start to hear sounds.
Weeks 21 to 24: From Carrot to Ear of Corn
Growth continues quickly as your baby reaches the size of a carrot and then an ear of corn.
Week 21: Carrot size, about 10.5 inches.
Week 22: Spaghetti squash size, roughly 11 inches.
Week 23: Large mango size, around 11.4 inches.
Week 24: Ear of corn size, approximately 12 inches.
At this point, your baby’s lungs are developing, preparing for breathing after birth.
Weeks 25 to 28: From Cauliflower to Eggplant
Approaching the third trimester, your baby grows from the size of a cauliflower to an eggplant.
Week 25: Cauliflower size, about 13.5 inches.
Week 26: Lettuce size, roughly 14 inches.
Week 27: Rutabaga size, around 14.5 inches.
Week 28: Eggplant size, approximately 15 inches.
Your baby’s brain is developing rapidly, and they start to practice breathing movements.
Weeks 29 to 32: From Butternut Squash to Coconut
In these weeks, your baby grows from a butternut squash to a coconut.
Week 29: Butternut squash size, about 15.2 inches.
Week 30: Cucumber size, roughly 15.7 inches.
Week 31: Pineapple size, around 16 inches.
Week 32: Coconut size, approximately 16.7 inches.
Your baby’s bones are fully developed but still soft, and they continue to gain weight.
Weeks 33 to 36: From Durian to Honeydew Melon
As you near the end of pregnancy, your baby grows from the size of a durian to a honeydew melon.
Week 33: Durian size, about 17 inches.
Week 34: Butternut squash size, roughly 17.7 inches.
Week 35: Honeydew melon size, around 18 inches.
Week 36: Honeydew melon size, approximately 18.5 inches.
Your baby’s lungs and brain continue maturing, and they start to settle into the birth position.
Weeks 37 to 40: From Pumpkin to Watermelon
In the final weeks, your baby reaches the size of a pumpkin and then a watermelon.
Week 37: Pumpkin size, about 19 inches.
Week 38: Pumpkin size, roughly 19.5 inches.
Week 39: Mini watermelon size, around 20 inches.
Week 40: Watermelon size, approximately 20 inches and 7.5 pounds on average.
Your baby is ready for birth, with all organs functioning and body fat increasing to regulate temperature after delivery.
Tracking your baby’s growth by comparing their size to fruits makes the pregnancy journey more tangible and fun. Each week brings new milestones and changes, and this guide helps you visualize those moments. Remember, every baby grows at their own pace, so these comparisons are approximate but provide a helpful snapshot.
Enjoy this special time and celebrate every stage of your baby’s development. If you want to learn more about pregnancy or need support, consult your healthcare provider for personalized advice. Your baby’s growth is a remarkable story unfolding week by week.
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