Conceive Fertile Calculator Pregnancy Due Date Months Weeks Days - JavaScript code

Pregnancy Extra Scripts

For Information use - How Pregnant am I? - see this page.
For Webpage Scripts - GO >>>> Pregnancy Due Date Countdown   ::   Count-up age script

Here you will find some extra scripts that maybe useful if you are pregnant or trying to conceive.

The dates calculated by these scripts is based on the fact that the average human pregnancy lasts about 280 days from the last menstrual period (LMP). Keep in mind, however, that these dates should be used as an estimate; it is not an exact calculation. In addition, these scripts are just for fun.

As soon as you think you're pregnant, it's important that you contact
your physician or other health care professional immediately.

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"How Pregnant am I?"

Always consult your physician or doctor to determine your correct due date.

Your date of delivery cannot be perfectly predicted, even if the exact date you concieved is known. Your doctor will work with you to set the most accurate estimated date of conception (EDC - also called "due date"). Using the first day of your last menstrual period (LMP) is universally used by medical professionals to determine your EDC, however other factors are also involved.

General Information
You may not have conceived on the day you had intercourse. Sperm can survive in the uterus for up to 3 days. LMP is the best constant from which to measure probable date of conception. Medically, 40 weeks is the best average length of pregnancy. Remember, the average month is 4 1/2 weeks long, not four. Since the number of weeks in a month varies, knowing how many weeks pregnant you are is much more accurate. Early ultrasounds are sometimes used to calculate EDC. Your doctor will work with you to establish the most accurate prediction of your EDC.


Please enter the first day of your last menstrual period:

Based on your LMP, today you are
week(s) and day(s) pregnant.

Conception likely occurred around:
(Approximately two weeks after your last menstrual period)

Estimated due date (40 weeks - full term):

Other Milestones

Reliable positive pregnancy test (5 weeks):  
Beginning of organ formation (5 weeks):  
Major organs have formed (10 weeks):  
End of first trimester (12 weeks):  
End of second trimester (27 weeks):  

Always consult your physician or doctor to determine your correct due date.


Due Date Calculator
It's hard to predict the baby arrival date exactly, but our calculator can give you an idea.
An average human pregnancy lasts for about 280 days or 40 weeks from the date of the last menstrual period (LMP). Traditionally, it has been calculated as 10 lunar months, or in terms of the modern calendar - 9 months and 7 days. Fertilisation however, occurs (considering an average menstrual cycle of 28 days) 14 days after the last periods. Thus, the actual duration of a human pregnancy (gestation period) is 280 - 14 = 266 days.

Enter the first day of your last period. If you don't know the exact date, calculate as close as possible. Keep in mind that this is an estimate based on your last menstrual period.


This 'Count-up age script' will give you time elapsed in
years, months, days, hours, minutes and seconds since an event.
Ideal for 'Baby Progress' or 'Little one's Photo' web page

For more Pregnancy information please visit: