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Calculate pregnancy details including due date, gestational age, and timeline milestones for tracking.
Standard cycle is 28 days.
March 8th, 2027
0 weeks, 0 days
Everything you need to know
Pregnancy tracking involves monitoring your progress through 40 weeks of gestation, from conception through delivery. Knowing what's happening at each stage helps you:
A typical pregnancy is divided into three trimesters, each with distinct developmental milestones and maternal changes.
Our pregnancy calculator tracks your entire pregnancy journey:
Enter Your Last Menstrual Period (LMP)
View Your Pregnancy Timeline
Track Progress
Estimated Due Date = Last Menstrual Period + 280 days (40 weeks)
Gestational Age = (Today's Date - LMP) / 7 days
Trimester:
- 1st: Weeks 1-12
- 2nd: Weeks 13-26
- 3rd: Weeks 27-40
Duration: 13 weeks + 5 days
| Week | Fetal Size | Major Events |
|---|---|---|
| 1-4 | Microscopic | Fertilization, implantation, cell division |
| 5 | Sesame seed (2-3mm) | Heartbeat detectable, neural tube forms |
| 6 | Lentil (4-5mm) | Brain development begins, limb buds appear |
| 7 | Blueberry (7-10mm) | Eye development, intestines form |
| 8 | Raspberry (14-20mm) | "Fetal period" begins, fingers/toes emerge |
| 9 | Grape (23mm) | Gender organs developing (not yet visible) |
| 10 | Prune (31mm) | Teeth developing, elbows/knees forming |
| 11 | Fig (40mm) | Can suck thumb, urinating, hair forming |
| 12 | Plum (54mm) | Fingernails/toenails forming |
| 13 | Peach (75mm, 0.6 oz) | End of first trimester, all major organs present |
Physical:
Emotional:
Medical milestones:
Miscarriage risk: ~20% of pregnancies (most ~75% occur before 12 weeks)
Medication concerns: Discuss all medications/supplements with provider; some are unsafe in pregnancy
Duration: 14 weeks
| Week | Fetal Size | Major Events |
|---|---|---|
| 14 | Lemon (87mm) | Ears move to proper position, eyebrows appear |
| 16 | Avocado (116mm) | Gender identifiable on ultrasound |
| 18 | Sweet potato (140mm) | Can hear sounds, fingerprints forming |
| 20 | Banana (160mm, 10.5 oz) | Viability begins, major anatomy forms |
| 24 | Corn (292mm, 1.3 lbs) | Viability improved, lungs developing |
| 27 | Cauliflower (366mm, 1.9 lbs) | Eyes opening, hearing fully developed |
Physical:
Emotional:
Medical milestones:
Viability: Baby could survive with intensive medical care at 22-24 weeks, but outcomes much better at 28+ weeks
Quickening: Mother feels baby movements, which accelerates bonding and reassurance
Duration: 12 weeks (plus potential overdue time)
| Week | Fetal Size | Major Events |
|---|---|---|
| 28 | Eggplant (375mm, 2.2 lbs) | Eyes can focus, developing sleep-wake cycles |
| 32 | Squash (430mm, 3.8 lbs) | Most development complete, rapid growth continues |
| 36 | Cantaloupe (480mm, 5.8 lbs) | Typically turns head-down for delivery |
| 37 | Winter melon (485mm, 6.3 lbs) | Full term, can be born any time with good outcomes |
| 40 | Watermelon (510mm, 7-8 lbs) | Due date, ready for delivery |
Physical:
Emotional:
Medical milestones:
Non-stress tests: May be done regularly in final weeks to ensure baby well-being
Induction discussion: Between 39-42 weeks, timing of delivery discussed with doctor
Cord blood banking: Decision needed about private vs public banking
| Weight | Week | What It Means |
|---|---|---|
| < 0.5 oz | Before week 13 | Embryonic period, miscarriage risk higher |
| 1 oz | Week 16 | End of critical organ formation |
| 3.5 oz | Week 20 | Viability begins (rough minimum) |
| 1 lb | Week 28 | Viability much improved |
| 2.5 lbs | Week 32 | Most systems developed, survival likely with NICU |
| 4 lbs | Week 36 | Term—can be born with minimal complications |
| 5-5.5 lbs | Week 37-38 | Ideal weight, all systems developed |
| 7-7.5 lbs | Week 39-40 | Average birth weight, fully developed |
Call your doctor if you experience:
Call your doctor immediately if you have:
When to go to hospital/birth center:
Exercise: Safe, continue as before (don't start new intense programs) Nutrition: Focus on folate, iron; eat when possible if nauseous Work: Can continue; tell employer when ready Sexual activity: Safe (no restrictions unless complications)
Exercise: Safest for new activity; walking and swimming ideal Nutrition: Add ~340 calories/day; iron-rich foods important Travel: Safe (avoid after 36 weeks) Sexual activity: Safe; may be more comfortable; may increase libido
Exercise: Continue but lower impact; pelvic floor exercises helpful Nutrition: Add ~450 calories/day; calcium important for baby Travel: Not recommended after 36 weeks Sexual activity: Safe until water breaks; may relieve discomfort
Scenario: Last menstrual period (LMP) on April 1, 2026
Calculation:
Pregnancy Milestones:
Due Date: April 1, 2026 + 280 days = December 7, 2026
Interpretation: At 8 weeks, major organ systems are forming. This is typically when first ultrasound dating occurs for confirmation and accuracy.
No. Due date is an estimate. Only ~5% deliver on exact date. Plan for ±2 week window. After 42 weeks, induction usually recommended.
First-time mothers: 16-20 weeks. Subsequent pregnancies: 13-16 weeks. Earlier feeling doesn't mean earlier delivery.
For normal pre-pregnancy BMI: 25-35 lbs total (about 1 lb/week in 2nd/3rd trimester). More variation for underweight/overweight/obese starting BMIs.
Depends on job demands. Many work until 36-38 weeks. Some stop earlier if complications or strenuous job. Discuss with employer and doctor.
Very normal. Talk to healthcare team, take childbirth classes, discuss fears. Most labors end safely.
Usually by 36 weeks. Breech at 36+ weeks may warrant interventions (external cephalic version or planned C-section).
Risk of stillbirth and complications increases. Induction typically recommended. Non-stress tests done if waiting.
Due Date Calculator • Pregnancy Weight Gain Calculator • Conception Calculator • Ovulation Calculator
This calculator is provided for educational and informational purposes only. It is not medical, fitness, nutritional, or professional advice. Results are estimates based on the assumptions and inputs you provide.
Actual results may differ significantly due to:
Do not rely on this calculator for:
Before making any health or fitness decisions, consult with:
Past performance and estimates do not guarantee future results. Always verify important information independently and consult qualified professionals for your individual circumstances.
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