Enter pregnancy details
Example data table
| Method | Reference date | Cycle | Risk | EDD | Highlighted item |
|---|---|---|---|---|---|
| LMP | Jan 10, 2026 | 28 days | Standard | Oct 17, 2026 | Anatomy ultrasound around 18–22 weeks |
| Conception | Feb 01, 2026 | 28 days | Standard | Oct 25, 2026 | Glucose screening around 24–28 weeks |
| Due date | Nov 12, 2026 | 28 days | High risk | Nov 12, 2026 | Extra surveillance may appear at 32–34 weeks |
Formula used
1) Estimated due date from last menstrual period:
EDD = LMP + 280 days + (cycle length - 28 days)
2) Estimated due date from conception date:
EDD = Conception date + 266 days
3) Estimated gestational age:
Gestational age in days = Current date - LMP
4) Weeks and days pregnant:
Weeks = floor(gestational days / 7), Remaining days = gestational days mod 7
5) Visit windows:
Calendar date for each milestone = LMP + (pregnancy week × 7 days)
The calculator maps common care windows such as dating scans, anatomy scans, glucose screening, weekly late-pregnancy visits, and postpartum follow-up planning.
How to use this calculator
- Choose whether you want to calculate from LMP, conception date, or estimated due date.
- Enter the matching date field and set the current date used for planning.
- Adjust cycle length if you are using the LMP method and your cycle differs from 28 days.
- Select risk level and optional care flags such as multiple pregnancy, Rh negative status, or higher diabetes risk.
- Set your preferred first prenatal visit week if you want a different intake timing.
- Press the submit button to generate the summary and full appointment calendar above the form.
- Use the CSV and PDF buttons to save the generated schedule.
- Review the plan with your clinician because actual prenatal care varies by health history, symptoms, and provider protocol.
FAQs
1) What does this calculator estimate?
It builds a prenatal planning calendar using your LMP, conception date, or due date. It also marks common visit windows, screenings, and late-pregnancy follow-up points.
2) Is the due date exact?
No. It is an estimate based on standard pregnancy dating rules. Ultrasound findings, cycle variation, and provider judgement may shift dates.
3) Why does cycle length matter?
When you calculate from LMP, longer or shorter cycles can shift ovulation timing. The tool adjusts the due date by the difference from a 28-day cycle.
4) Can high-risk pregnancies follow this exactly?
Not always. High-risk care often adds scans, testing, or more frequent visits. This tool adds extra monitoring prompts, but clinical care can be much more individualized.
5) Why is postpartum follow-up only estimated?
Because the actual postpartum visit depends on the delivery date and recovery needs. The calculator shows a planning window rather than a fixed appointment.
6) Does this replace medical advice?
No. It is a planning and education tool. Symptoms, blood pressure changes, bleeding, reduced fetal movement, or urgent concerns require direct medical guidance.
7) Can I use it if I know only my due date?
Yes. Choose the due date method. The calculator back-estimates an LMP so it can place trimester milestones and appointment windows on the calendar.
8) What file formats can I export?
You can export the generated schedule as CSV for spreadsheets and as PDF for sharing or printing. Export buttons appear with the result panel.