Pregnancy & Baby Index: Trying to Conceive - TTC: Preparing to TTC: Conception date calculator
Conception date calculator
When was your baby conceived? Enter the date of the first day of your last menstrual period (LMP), and we'll print out a table showing you the probable dates of conception, based upon the average length of your menstrual cycle.
Note: Your browser must be Java-enabled for the calculator to work.
Conception, due dates and gender
Ovulation, and therefore conception, occurs 14 days
before your period was due. If you have a 28-day menstrual cycle -- which is assumed by many healthcare providers -- that means that you ovulated on day 14. If your cycle is a few days longer, you probably ovulated after day 14, and your baby may arrive a few days after your estimated due date. (
Confused about "age since conception," LMP and due dates? Get an explanation here.)
Knowing how your ovulation date coincided with the potential for conception may also give you a hint as to the sex of the baby you're carrying.
Author and physician Landrum Shettles says in his book,
How to Choose the Sex of Your Baby: The Method Best Supported by Scientific Evidence (Doubleday), when trying for a boy, the father should not have an ejaculation for the three days before the "target date" a day or two before ovulation. If a girl is your goal, have intercourse regularly, but stop three days before ovulation.
The reasoning behind the "Shettles method" is that "female" and "male" sperm actually behave differently: "female" sperm are slower but live longer, while "male" sperm move faster and die younger.
Fill in your LMP date below
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