1. What is Pregnancy Week and Month Calculation?

Pregnancy week and month calculation determines the current stage of pregnancy based on the last menstrual period (LMP). This method is widely used by healthcare providers to track fetal development and estimate due dates.

2. How Does the Calculator Work?

The calculator uses standard pregnancy duration formulas:

Where:

• \( \text{LMP} \) — Last menstrual period date
• \( \text{Current Date} \) — Today's date or specified date
• \( 30.44 \) — Average days per month
• \( 7 \) — Days per week
• \( \lfloor \rfloor \) — Floor function (round down)

Explanation: The calculation starts from the first day of your last menstrual period, which is the standard method for calculating pregnancy duration.

3. Importance of Pregnancy Tracking

Details: Accurate pregnancy tracking helps monitor fetal development, schedule prenatal appointments, prepare for delivery, and identify any potential complications early.

4. Using the Calculator

Tips: Enter the first day of your last menstrual period and the current date (defaults to today). Ensure dates are in the correct format and that LMP date is before current date.

5. Frequently Asked Questions (FAQ)

Q1: Why is pregnancy calculated from LMP instead of conception?
A: LMP is used because it's easier to recall and track than conception date. Pregnancy is typically 40 weeks from LMP.

Q2: How accurate is this calculation?
A: This provides a good estimate, but ultrasound measurements in early pregnancy are more accurate for dating.

Q3: What if I don't know my exact LMP?
A: Use your best estimate. An early pregnancy ultrasound can provide a more accurate gestational age.

Q4: Why 30.44 days per month?
A: This accounts for the average month length (365.25 days ÷ 12 months) for more accurate monthly calculations.

Q5: When should I see a healthcare provider?
A: Schedule your first prenatal appointment as soon as you suspect pregnancy, typically around 8 weeks from LMP.