The Parentage Testing Laboratory conception calculator

The Parentage Testing Laboratory conception calculator can be used to predict the
following:

1. Due date of an unborn child,
2. Probable date of conception,
3. Dates a pregnancy test would be positive,
4. Dates that a CVS test can be performed,
5. Dates that a Early Amnio test can be performed, and
6. Dates that a standard Amnio Screen test can be performed

These dates are usually calculated starting from the first day of the
Mother's last menstrual period (found on the left side of the chart
below). However, these dates can also be calculated based on the due
date that the doctor has calculated by measuring the size of the unborn
child. These dates may fluctuate during the pregnancy.