How long do you have to wait to take a pregnancy test?

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Best information and tips about help for pregnant women, help with pregnancy and pregnancy help
I heard approximately three weeks from the first time having sex, but I’m not sure because another friend told me it could detect it as soon as four days. Also, any advice on which pregnancy test to use?

14 days past unprotected sex.
Your friend is wrong.
Wait three weeks from sex, or when you miss your period. Any brand will do.
About 3 days before your next period is due, First response can detect the pregnancy hormone 4/5 days before your expected period if you do it any earlier it could come up negative.
a week before your period is due you can get a blood test. Or take a pregnancy test a week after your period is due.
you can take most test 5 days before your expected period is due.
It won’t work if you test four days after the encounter. You have to wait and see if you miss a period and then take a test. Some tests can detect up to five days before your missed period, but they aren’t near as accurate as on the day of your missed period.
It is different for every women.
I ovulated Feb 12th and Got my BFP Feb 22.
For me, I tested Positive 10 days after Ovulation.