A normal pregnancy can last anywhere between 38 and 42 weeks.If you want to, you can view a sample due date report.If you are doing basal temperature charts (BBTs), ovulation predictor (LH) kits, or tracking other signs of fertility, these tools can also help you narrow down your time of conception.

Follow your baby's development week by week in our article series.

We have created a slew of pregnancy calculators and tools to help you through your pregnancy.

However, any calculation of the date is only an estimate of the actual day a sperm met and fused with your egg.

Conception (egg fertilization) usually occurs on the day of ovulation if there is sperm around but may be within a day or two later if intercourse is delayed until then.

It is company policy to NOT accept any other Eligibility Dates than those calculated using this calculator.

The use of accurate dates ensures that you will receive reliable results with a high accuracy.

These calculations are based on the average period of conception for a woman based on either the First Day of the Last Menstrual Period or the Predicted Due Date as provided by a health care provider.

The Early Gender Test depends on accurate calculations.

The Eligibility Date provided using this calculator is the ONLY date we will accept (unless your pregnancy has been conceived by in vitro fertilization, and therefore you will know your actual date of conception).

The finger-prick specimens must be collected either on or after this Eligibility Date.

Doctors do not use the date of conception to date a pregnancy but rely on the date of your last period or/and an early pregnancy dating ultrasound, according to the American Congress of Obstetricians and Gynecologists.