â¦longevity of seeds, the dormant embryo plant contained within the seed will lose its viability (ability to grow) if germination fails to occur within a certain time. Reports of the sprouting of wheat taken from Egyptian tombs are unfounded, but some seeds do retain their viability a long time.
Implantation bleeding-Spotting during pregnancy may be caused by implantation. Implantation bleeding occurs after the egg burrows into the lining of the uterus. As the egg implants into the lining sometimes a little bit of bleeding will occur.
Miscarriage or ectopic pregnancy. Spotting or bleeding in the first trimester, especially if accompanied by abdominal pain or cramping, can be an early sign of miscarriage or an ectopic pregnancy (when the embryo implants outside the uterus, usually in one of the fallopian tubes).