Implantation typically occurs about **6 to 10 days after fertilization** of the egg. Here’s a breakdown of the timeline related to conception and implantation:
1. **Ovulation**: An egg is released from the ovary, and it is viable for fertilization for about 12 to 24 hours.
2. **Fertilization**: If sperm are present in the fallopian tube during this time, fertilization can occur, typically within 24 hours after ovulation.
3. **Travel to the Uterus**: The fertilized egg (now called a zygote) travels down the fallopian tube toward the uterus. This journey takes about **3 to 6 days**.
4. **Blastocyst Stage**: Once the zygote reaches the uterus, it develops into a blastocyst, which is a hollow ball of cells. This stage usually occurs around 5 to 6 days after fertilization.
5. **Implantation**: The blastocyst then implants itself into the uterine lining, usually between **6 to 10 days post-fertilization** (which corresponds to about days **20 to 26** of a typical 28-day menstrual cycle).
If implantation occurs successfully, it can trigger hormonal changes that may lead to the first signs of pregnancy, such as a missed period. After implantation, it may take a few days for pregnancy hormone levels (like hCG) to rise enough to be detected by a home pregnancy test, which usually occurs around the time of a missed period.
