The time of pregnancy is calculated from the first day of your last menstrual period (LMP), which is typically two weeks before conception actually occurs. This means the first two weeks of the 40-week count are before fertilization, during which your body prepares for ovulation and a new cycle begins
The real problem is all those bullshit US “heartbeat” bills that put a cut-off on abortions at 6 weeks. They also count from LMP. So 6 weeks is just 2 weeks late for your next period. Basically by the time you find out you’re pregnant, you can’t get an abortion anymore.
Bingo! You figured it out! They know this and it’s by design.