pregnancy tests

[hothead]

how many weeks pregnant do you have to be before it shows up positive on a home pregnancy test please

[redcrx]

some (First response is one brand name) can be used up to 4 days before your period is due.
But as it works by testing for the hormone produced by the body when pregnant they are not always too accurate until the hormone levels are sufficient.
If you suspect you may be pregnant and are getting negative tests a week after period was due you may be able to get a blood test done at your doctors as this should be able to spot lower levels of the hormone.