Signs of pregnancy vary depending on the stage of the pregnancy. Symptoms can begin as early as one week after conception, according to the American Pregnancy Association. Beside a missed or late menstrual period, other early symptoms may include swollen or tender breasts, nausea, headaches or lower backaches. Some women experience these very early signs, and other women do not experience any symptoms of pregnancy for several weeks.
Another early sign of pregnancy can be spotting. When the embryo implants itself into the uterine wall about six to 12 days after conception, some women experience cramping and spotting. Fatigue is a symptom that can occur as early as one week into the pregnancy or at a later point. According to the American Pregnancy Association, the classic symptom of morning sickness can happen at about two to eight weeks of pregnancy and may also continue much later into the pregnancy. Other women do not experience morning sickness at all. At about six to eight weeks, many women notice that they need to urinate more frequently. Some women experience cravings or aversions for certain foods that can last throughout the pregnancy. A doctor should be consulted as soon as possible when a woman suspects that she is pregnant.