The botanical gardens, lawns and extensive natural bushland of Kings Park in Perth form a peaceful green oasis right in the very centre of the city. At 4.06km 2, it's the world's biggest inner city park. Kings Park occupies Mount Eliza, one of the highest points in Perth's mostly flat landscape. It soars high above the Swan River and the Perth skyline, with panoramic views to the east from the edge of a steep escarpment.
When a fertilized egg does implant, a hormone called human chorionic gonadotropin (hCG) begins to be produced in the uterus. This is the hormone that a pregnancy test measures. It prevents the uterine lining from being shed, so the woman does not have a period.
For non-pregnant women, the egg will not be fertilized and will disintegrate in the body. However, fertilization must occur for implantation to begin. Sperm can live in the body for 5 days. If fertilization has occurred, the egg will stay within the fallopian tubes for 3 to 4 days instead of just 1 day.