how soon after conception do symptoms start

Pregnancy symptoms can start as early as about 6 days after conception, which is roughly the time when the fertilized egg implants into the uterine wall. Some women may notice very mild symptoms even around 4 days post-ovulation (conception). Common early signs include implantation bleeding or spotting (usually 6-12 days after fertilization), mild cramping, breast tenderness, fatigue, nausea, and missed periods. However, many symptoms typically start around 1-2 weeks after conception or closer to when the next period is due. Symptoms vary widely among individuals, and some women may not notice any symptoms until weeks later or after a missed period.