How does the timeline of implantation correlate with the menstrual cycle and affect pregnancy testing?

Implantation aligns with ovulation, making pregnancy detectable immediately.

Implantation prevents menstruation, detectable by day 14.

Implantation occurs around day 20-24, allowing HCG detection by the expected menstrual cycle around day 28.

Implantation occurs at the end of the cycle, delaying pregnancy detection until day 40.