Every woman's body and chemical make up is different. Some women feel pregnancy symptoms within a week of conception, while others may take longer.
When the fertilized egg buries itself in the uterine lining, it may cause some spotting. This occurs six to 12 days after conception. The spotting is very minimal and may be light pink in color.
The hormone progesterone surges when pregnancy occurs. This increase in progesterone may cause the woman's breasts to swell and become tender as early as one week after conception.
Progesterone is also responsible for causing a woman to feel tired. You may notice fatigue one to two weeks after conception depending on how much progesterone is being produced.
Morning sickness or stomach discomfort may begin to be felt as early as two weeks after conception. Nausea, vomiting and sensitivity to smells are all symptoms of morning sickness.
The most trustworthy sign of pregnancy is the absence of a menstrual period. This occurs approximately two weeks after conception or sexual intercourse. A home pregnancy test can be taken at this time to confirm a pregnancy.