I had iui done 8 days ago with hcg shot and took test was neg?

A negative pregnancy test result 8 days after an intrauterine insemination (IUI) with an hCG injection is not conclusive. It is still possible that you may be pregnant, as it may take longer for the hCG levels to rise to detectable levels in your urine or blood. Factors that can affect the timing of a positive pregnancy test include:

Implantation timing: After IUI, the fertilized egg takes several days to implant in the uterine wall. Implantation can occur anywhere from 6 to 12 days after ovulation.

hCG levels: The hCG hormone is produced by the developing placenta after implantation. It takes time for the hCG levels to rise and become detectable. In some cases, it may take up to 10-14 days after ovulation for hCG levels to reach levels that can be detected by a home pregnancy test.

Test sensitivity: The sensitivity of pregnancy tests varies. Some tests are more sensitive than others and can detect lower levels of hCG. If you used a less sensitive test, it may not have been able to detect the hCG levels in your urine or blood at this early stage.

It is recommended to wait a few more days and repeat the pregnancy test to obtain a more accurate result. If you still have a negative result and your period does not start, it is advisable to consult with your healthcare provider to discuss your options and determine the next steps.