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.
Conditions that cause extra bleeding. If you usually have a regular cycle, a change in your cycle, such as suddenly having two periods in a month, could indicate a medical condition. Some health conditions cause bleeding that can be mistaken for a period. Pregnancy can cause spotting.