Understanding the Signs and Symptoms of Pregnancy

Pregnancy symptoms differ from woman to woman and pregnancy to pregnancy; however, one of the most significant pregnancy symptoms is a delayed or missed period. Understanding the signs and symptoms of pregnancy is important because each symptom may be related to something other than pregnancy. You may experience signs or symptoms of pregnancy within a week of conception. However, it is possible you may not experience any symptoms for a few weeks.

http://americanpregnancy.org/gettingpregnant/earlypregnancysymptoms.html