A chemical pregnancy is a very early pregnancy loss that occurs shortly after implantation, usually before it can be seen on ultrasound, detected only by a positive pregnancy test, whereas a clinical pregnancy is confirmed by ultrasound showing a gestational sac or heartbeat. Chemical pregnancies often happen due to chromosomal abnormalities in the embryo, but can also be linked to hormonal imbalances, implantation issues, or uterine conditions. They are quite common and usually do not affect future fertility, as many women go on to have healthy pregnancies afterward. You should consult a doctor if you experience repeated early losses, heavy bleeding, severe pain, or difficulty conceiving, to rule out underlying issues and receive proper guidance.