Calculating Pregnancy: Understanding Conception vs. LMP Dates

It is possible to conceive on February 10, 2007, and have a first day of your last menstrual period (LMP) of January 27. However, pregnancy calculators typically calculate pregnancy weeks from the first day of your LMP, not from the date of conception. This means that if you were conceived on February 10, 2007, and your first day of LMP was January 27, you would not be 5 weeks pregnant until March 10, 2007.

Here is a breakdown of the timeline:

* Conception: February 10, 2007

* First day of LMP: January 27, 2007

* Weeks pregnant (based on LMP):

* Week 1: January 27 - February 2, 2007

* Week 2: February 3 - 9, 2007

* Week 3: February 10 - 16, 2007

* Week 4: February 17 - 23, 2007

* Week 5: February 24 - March 2, 2007

* Week 6 (when you would be 5 weeks pregnant): March 3 - 9, 2007

It is important to note that pregnancy calculators are only estimates, and actual pregnancy lengths can vary. Therefore, it is important to talk to your healthcare provider to determine your exact due date.