Pregnancy week by week
Enter your due date to see what week you're in, then follow along trimester by trimester with a guide for every week from 12 to 40.
Due Date Tracker
Enter your due date and we'll work out your current pregnancy week and trimester.
Baby size by week
A friendly produce comparison for each week, from a plum at week 12 to a small pumpkin at week 40. It's a fun way to picture how things are growing, not a measurement to act on.
| Week | Trimester | About the size of |
|---|---|---|
| Week 12 | First trimester | 🫐 plum |
| Week 13 | First trimester | 🍋 lemon |
| Week 14 | Second trimester | 🍑 peach |
| Week 15 | Second trimester | 🍎 apple |
| Week 16 | Second trimester | 🥑 avocado |
| Week 17 | Second trimester | 🍐 pear |
| Week 18 | Second trimester | 🫑 bell pepper |
| Week 19 | Second trimester | 🍅 tomato |
| Week 20 | Second trimester | 🍌 banana |
| Week 21 | Second trimester | 🥕 carrot |
| Week 22 | Second trimester | 🍠 sweet potato |
| Week 23 | Second trimester | 🍊 grapefruit |
| Week 24 | Second trimester | 🌽 corn on the cob |
| Week 25 | Second trimester | 🥒 zucchini |
| Week 26 | Second trimester | 🥒 cucumber |
| Week 27 | Second trimester | 🥦 cauliflower |
| Week 28 | Third trimester | 🍆 eggplant |
| Week 29 | Third trimester | 🎃 butternut squash |
| Week 30 | Third trimester | 🥬 cabbage |
| Week 31 | Third trimester | 🥥 coconut |
| Week 32 | Third trimester | 🥬 bunch of celery |
| Week 33 | Third trimester | 🍍 pineapple |
| Week 34 | Third trimester | 🍈 cantaloupe melon |
| Week 35 | Third trimester | 🍈 honeydew melon |
| Week 36 | Third trimester | 🥬 romaine lettuce |
| Week 37 | Third trimester | 🥬 leek |
| Week 38 | Third trimester | 🥬 stick of rhubarb |
| Week 39 | Third trimester | 🍉 watermelon |
| Week 40 | Third trimester | 🎃 small pumpkin |
Week-by-week guides
Tap any highlighted week to read the guide for that stage. We're adding more weeks over time.
How to use this tracker
Pregnancy is usually counted in weeks, from the first day of your last period through to your due date, which lands around week 40. Most people find it easier to think in weeks than in months, and most week-by-week content is organized that way too.
Enter your due date above and the tracker works backwards to show your current week and trimester. From there you can open the guide for the week you're in, or read ahead to the ones coming up. The baby-size comparisons give you a simple picture of how things are progressing.
Every pregnancy runs on its own timeline, so treat the weeks here as a general map rather than a schedule. The dating from your care provider's scan is always the number to go by, and any question about your own pregnancy is one for them.
Sources
- NHS. Pregnancy week-by-week guide (size comparisons), 2024
- NICHD Fetal Growth Studies. Buck Louis et al., American Journal of Obstetrics & Gynecology, 2015
Keep the countdown in your pocket
nappi counts down to your due date, shows your baby's size each week, then flips to sleep and feeding tracking the day your baby arrives.