Usually, it's because the sperm gets into the fallopian tube before the egg is released. Once there, the sperm wait for an egg to arrive. After fertilization, it can take 5-10 days for the fertilized egg to begin to attach itself to the lining of the uterus. Pregnancy begins when this happens.
The arrangement of spikes originally had no distinct name; the term Thagomizer was coined in 1982 by cartoonist Gary Larson in his comic The Far Side, and thereafter became gradually adopted as an informal term within scientific circles, research, and education.
Thalgo is a world leader in Spa, renowned for treatments and products that deliver excellent results. Founded in 1964, it is the original French marine spa brand, and has from the outset been led by science and marine research. Today, Thalgo is the range chosen by over 20,000 top spas, beauty salons, and thalassotherapy centers in more than 90 countries.