What causes empty uterus with positive pregnancy test?

An empty uterus with a positive pregnancy test may indicate a condition known as a biochemical pregnancy, where a fertilized egg implants briefly but does not develop further. Other possible causes include an early miscarriage, ectopic pregnancy (where the embryo implants outside the uterus), or issues with the pregnancy test itself, such as false positives. It's essential to follow up with a healthcare provider for further evaluation and appropriate imaging.