Adhesions typically begin to form within the first few days after surgery, but they may not produce symptoms for months or even years. As scar tissue begins to restrict motion of the small intestines, passing food through the digestive system becomes progressively more difficult. The bowel may become blocked.
At the time of implantation, the placenta starts making the pregnancy hormone hCG, which then enters the blood stream. hCG can be detected in the blood about 3 to 4 days after implantation. Urine hCG can be detected about 2 to 3 days after blood hCG can first be seen. Detection of hCG depends on timing of implantation so hCG can normally be detected in the blood between 9 and 16 days after ovulation (HPT: 12-19 days after ovulation).
A qualitative hCG test: This test confirms if the blood contains hCG and indicates if you are pregnant or not. Doctors use it to confirm pregnancy 10 days after missing your period or earlier. This partly answers your question how many days after missed period pregnancy test is positive. A quantitative hCG test: This test gives the accurate amount of hCG in a woman's blood including very little amounts.