Symptoms of egg implantation in the uterine wall may include spotting, called implantation bleeding, and cramps, explains the American Pregnancy Association. However, a woman can fail to experience or notice these symptoms and still be pregnant. The symptoms may also have other causes, such as menstruation or an infection.
Implantation occurs about six-to-12 days following the conception of a pregnancy, notes the American Pregnancy Association. Another early sign of pregnancy is a missed menstrual period, although some women experience vaginal bleeding during pregnancy. The bleeding that occurs during pregnancy is typically lighter or shorter in duration than a woman experiences during regular menstruation. Missed periods do not always indicate pregnancy, however. A woman may also skip a period due to significant weight changes, illness, stress, birth control cessation or hormonal abnormalities.
As early as one-to-two weeks following conception, a pregnant woman may notice her breasts becoming swollen or tender, according to the American Pregnancy Association. She may feel more tired than usual, and she might begin experiencing morning sickness between two-and-eight weeks following conception. Some women experience nausea throughout the majority of their pregnancies, while others never endure any morning sickness. Other symptoms that may signal pregnancy are lower backaches, headaches, frequent urination six-to-eight weeks following conception, food cravings, food aversions and darkening of the skin around the nipples.