ELI5- Why aren’t pregnancies “discovered” earlier on?

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I’m not totally sure how to ask this. So most people find out they’re pregnant between 6-8 weeks. And it’s relatively common knowledge that one does not get their period while pregnant. So my question is, how do people not find out they’re pregnant until around 6 weeks if the average menstrual cycle is 4 weeks? Ovulation occurs on, I believe, day 14 in the cycle, so shouldn’t more pregnancies be discovered at 2-3 weeks when the initial next period would occur?

ETA: thank you for the responses! My confusion began with the the whole “you’re 6 weeks pregnant” when it’s more than likely 3-4 weeks of legitimate gestation due to how doctors begin the “clock” at the end of the last menstrual cycle.

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Anonymous 0 Comments

Others have explained about conception is two weeks after last period so actually considered 2 weeks in the pregnancy. And about the average cycle being 28 days.

There is another factor to any delay too. Even if a woman has a rough cycle of 28 days (for many 28 days is a rough thing for them. It can vary by a day or two) there are so many things that can throw off that 28 days and can make a period early or late. Even a basic viral cold can do it. A bit more stress that normal aswell. So being even a week or two late might not ring alarm bells if it’s happened before.

On top of that if the woman is on some form of contraception that they view as reliable, they may not think they could be pregnant.

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