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.
One of the first early signs of pregnancy is implantation bleeding. Between approximately day 10 and 14, the embryo implants in the uterus, which sometimes causes a small amount of spotting. After conception, the body produces progesterone, which is responsible for nausea.