USA Pregnancy Due Date Calculator

Calculate your estimated USA pregnancy due date and current trimester using the Naegele rule.

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Free USA Pregnancy Due Date Calculator — Trimester Tracker

Approximately 3.6 million babies are born in the United States each year. American OB-GYNs calculate your estimated due date (EDD) using Naegele rule: add 280 days (40 weeks) to the first day of your last menstrual period (LMP). However, only about 5% of USA babies are born on their exact due date — most arrive within a 2-week window. The average USA pregnancy lasts 39-40 weeks, and full-term is defined as 39-40 weeks by the American College of Obstetricians and Gynecologists (ACOG). This calculator helps American mothers-to-be track their due date, current trimester, and pregnancy milestones.

🇺🇸 USA Pregnancy Care Timeline

The American College of Obstetricians and Gynecologists (ACOG) recommends prenatal care visits every 4 weeks through 28 weeks, every 2 weeks from 28-36 weeks, and weekly from 36 weeks until delivery. USA health insurance is required to cover prenatal care with no copay under the ACA. The average USA hospital delivery costs $5,000-$11,000 (vaginal) or $7,500-$14,500 (C-section) after insurance. Medicaid covers approximately 42% of all USA births.

✨ Key Features

ACOG Standards

Based on the American College of Obstetricians and Gynecologists prenatal care guidelines.

Trimester Tracking

See which USA trimester you are in and key developmental milestones for each stage.

Cycle Adjustment

Adjusts the due date based on your actual USA cycle length — not all cycles are 28 days.

USA Pregnancy Trimesters

1st Trimester (Weeks 1-12)

Organ development begins. USA prenatal visits every 4 weeks. First ultrasound typically at 8-12 weeks. Morning sickness peaks around weeks 8-10.

2nd Trimester (Weeks 13-26)

The golden period. Anatomy scan at 18-22 weeks. Gender reveal possible. USA glucose screening test at 24-28 weeks.

3rd Trimester (Weeks 27-40)

Baby gains weight rapidly. USA visits increase to every 2 weeks, then weekly. Group B strep test at 36 weeks. Full-term at 39+ weeks.

Overdue (40+ Weeks)

ACOG recommends induction by 42 weeks. USA OB-GYNs typically discuss induction options after 41 weeks of pregnancy.

Tips for American Mothers-to-Be

Start prenatal vitamins (400mcg folic acid) as soon as possible — USA OB-GYNs recommend starting before conception.
USA health insurance must cover prenatal care with no cost-sharing under the ACA — verify your coverage and choose an in-network provider.
The average USA hospital delivery costs $5,000-$11,000 after insurance — check your plan deductible and out-of-pocket maximum.
Apply for FMLA leave (12 weeks unpaid, job-protected) if you work for a USA employer with 50+ employees. Some states offer paid family leave.
Only 5% of USA babies arrive on their exact due date — most come within 2 weeks before or after. Pack your hospital bag by 36 weeks.

❓ Frequently Asked Questions

How accurate is a USA pregnancy due date?
Only about 5% of babies are born on the exact due date. Most arrive within 2 weeks of the EDD. First-trimester ultrasound measurements are accurate to ±5 days. The Naegele rule (LMP + 280 days) is the standard USA method.
What is full-term pregnancy in the USA?
ACOG defines full-term as 39-40 weeks. Early term is 37-38 weeks. Late term is 41 weeks. Post-term is 42+ weeks. USA OB-GYNs generally recommend induction between 41-42 weeks.
How much does pregnancy and delivery cost in the USA?
Average USA costs after insurance: vaginal delivery $5,000-$11,000, C-section $7,500-$14,500. Without insurance: $10,000-$30,000+. Medicaid covers ~42% of USA births for low-income families.
What USA maternity leave am I entitled to?
FMLA provides 12 weeks of unpaid, job-protected leave for eligible USA employees (companies with 50+ workers). 13 states plus DC now offer paid family leave programs. Check your state and employer policies.