Is it possible to test negative at about 4-5 weeks pregnant?

Yes, it is possible to test negative at 4-5 weeks pregnant. Pregnancy tests detect the presence of human chorionic gonadotropin (hCG) in the urine or blood, which is a hormone produced by the developing placenta. However, the levels of hCG in early pregnancy can be low, and it may take several days or even weeks for them to reach detectable levels. As a result, a negative pregnancy test at 4-5 weeks does not necessarily mean that a woman is not pregnant.

If a woman suspects that she may be pregnant, even if she has received a negative pregnancy test result, it is important to consult a doctor or midwife for further testing and evaluation. A blood test can detect hCG levels more sensitively than a urine test, and can provide a more definitive answer about pregnancy status.