Implantation bleeding

3 Interesting Facts of Implantation bleeding

1. Small amount of bleeding may occur during implantation of blastocyst into endometrium and at the time of first missed menses
2. Bleeding from implantation is scant, is lighter colored without clots, and lasts only a few hours to a few days, whereas bleeding associated with an impending miscarriage typically turns heavy with a dark color and visible clots
3. If needed, serial serum hCG levels can be used to distinguish between the 2
   • If bleeding is simply due to implantation, β-hCG levels should continue to rise predictably as in a normally developing pregnancy, whereas levels will decline with miscarriage