After implantation bleeding the body begins producing the human chorionic gonadotropin hormone, which then enters the bloodstream, according to MedGuidance. Three to four days after implantation bleeding, the hCG hormone becomes present at a sufficiently high level to detect pregnancy using a home pregnancy test. Within two to three days after implantation bleeding, the pregnancy is detectable using a blood pregnancy test.
Around the same time as implantation bleeding or shortly after, a woman may notice some of the early signs of pregnancy, such as breast tenderness, fatigue and morning sickness, according to WebMD. Hormone levels change rapidly during pregnancy and sore, swollen and tingly breasts are a common early pregnancy symptom. In some women, the areola darkens in the early stages of pregnancy. About one week after conception, a feeling of tiredness is very common and continues for several weeks as her body adjusts to the pregnancy. Nausea and morning sickness do not affect all pregnant women, but when it does, it often begins shortly after implantation bleeding and the subsequent missed period. Many women also develop strong aversions or cravings for certain foods during the early stages of pregnancy. Other early pregnancy symptoms that can begin after implantation bleeding include constipation, frequent urination, mood swings, headaches and back pain.