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).
In early pregnancy, one low hCG result is not necessarily a cause for concern; normal hCG levels vary dramatically from person to person. When hCG levels are rising too slowly or dropping over time, however, this could be a symptom of miscarriage or other pregnancy complications. A single low hCG result on a blood test is not enough to diagnose a miscarriage in early pregnancy unless the low hCG level follows an earlier, higher hCG level. 1  Usually, if a doctor believes that a single hCG result is low, the doctor will order another one in two to three days to check the hCG doubling time.