You can tell if you're pregnant as early as about 8 days after ovulation with the most sensitive home pregnancy tests, which detect the hormone hCG produced after implantation of a fertilized egg. Some early physical signs can appear within the first two weeks after conception, including implantation bleeding (spotting), sore or swollen breasts, increased urination, nausea, fatigue, and changes in taste or smell. However, the most reliable and earliest common sign is a missed period, usually noticed about 1-2 weeks after conception for those with regular menstrual cycles. Pregnancy tests are most accurate when taken at least a week after a missed period, but some tests claim to work a few days earlier than that.
