Build Your Personal Pregnancy Calendar
Your Custom Weekly Pregnancy Timeline
Weekly Baby Growth Reference Chart (ACOG Standard)
| Week Range | Baby Size Comparison (Fruit Reference) | Key Developmental Milestones | Maternal Physical Changes |
|---|---|---|---|
| Weeks 1–6 | Poppy Seed → Lentil Bean | Neural tube forms, heart begins beating | Mild fatigue, tender breasts, light nausea |
| Weeks 7–13 | Blueberry → Lemon | Limbs & facial features develop, organs form | Morning sickness, frequent urination, mood swings |
| Weeks 14–20 | Avocado → Banana | Fetal movement felt, hair & nails grow | Increased energy, visible baby bump, appetite boost |
| Weeks 21–27 | Coconut → Cauliflower | Lungs mature, eyes open, hearing fully functional | Back pain, stretch marks, heartburn, leg cramps |
| Weeks 28–40 | Pineapple → Watermelon | Fat storage builds, ready for delivery | Shortness of breath, pelvic pressure, Braxton Hicks |
Frequently Asked Pregnancy Calendar Questions
How accurate is LMP due date calculation?
Standard LMP dating has a ±7 day margin of error. Ultrasound scan in the first trimester provides the most precise due date for your pregnancy calendar.
What critical appointments should I mark on my weekly calendar?
8–12 week first ultrasound, 20 week anatomy scan, glucose tolerance test (24–28 weeks), Group B strep test (35–37 weeks), weekly OB visits starting week 36.
Why does twin pregnancy have a shorter calendar timeline?
Multiple pregnancies typically deliver between 36–38 weeks. Your twin calendar will flag extra prenatal monitoring starting week 24 to track preterm labor risk.
What nutrition milestones should I track each week?
First trimester: maintain folic acid intake; Second trimester: boost iron & DHA; Third trimester: increase calcium and protein for fetal weight gain.
Can I use this calendar for postpartum tracking?
Yes, the calendar includes a postpartum section to track hormone recovery, breastfeeding milestones, and 6-week postnatal checkup reminders.