Pregnancy symptoms can start very early, often within about 1 to 2 weeks after conception. Some women may experience signs as early as 6 days post- fertilization, which is around the time the fertilized egg implants in the uterus. Early symptoms include sensitivity to smell, tender breasts, fatigue, mild cramping, spotting (implantation bleeding), and raised basal body temperature. Other symptoms such as frequent urination, mood swings, and nausea commonly develop around the time of a missed period or shortly after, typically 4 to 6 weeks into pregnancy. The timing and presence of symptoms can vary greatly between individuals, with some women experiencing symptoms before their missed period and others not noticing anything until weeks later.
