## How do I calculate my LMP?

Most pregnancies last around 40 weeks (or 38 weeks from conception), so typically the best way to estimate your due date is to count 40 weeks, or 280 days, from the first day of your last menstrual period (LMP). Another way to do it is to subtract three months from the first day of your last period and add seven days.

### How many periods can you use to calculate historical returns?

When you hit the “Calculate Historical Returns”, a table will be generated for you here. There are only three inputs you’ll need to think about before running the tool. There is no hard limit on the number of periods – select as many periods as you think your eyesight and computer will handle (or run it multiple times).

#### How to calculate historical returns for the S & P 500?

When you hit the “Calculate Historical Returns”, a table will be generated for you here. There are only three inputs you’ll need to think about before running the tool. There is no hard limit on the number of periods – select as many periods as you think your eyesight and computer will handle (or run it multiple times).

**How does your fundal height determine your due date?**

Your fundal height, which is the measurement from your pubic bone to the top of your uterus, is checked by your practitioner at each prenatal visit and helps confirm your due date. The size of your uterus, which will be noted when your initial internal pregnancy exam is performed, can also be a factor in pinpointing the EDD.

**When was the last time you had a period?**

Based on your last period starting at November 15, 2014 and having a length of 4 days, the results are: ■ Your next menstrual period is most likely to start on December 16, 2014;

## How does the period calculator work for You?

The period calculator takes account of the first day of your last menstrual period, the menstrual cycle length and the length of the period.

### How is the due date of confinement estimated?

The due date, also known as the estimated date of confinement, is an estimation of when a pregnant woman will deliver her baby. While the due date is often estimated as a single date, it can be helpful to consider a range of due dates, since only 4% of births occur on the estimated due date. 1. Due dates can be estimated using a number

Your fundal height, which is the measurement from your pubic bone to the top of your uterus, is checked by your practitioner at each prenatal visit and helps confirm your due date. The size of your uterus, which will be noted when your initial internal pregnancy exam is performed, can also be a factor in pinpointing the EDD.