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.
The term heliography was coined by Joseph Nicephore NicÃ©phore niepce niÃ©pce to identify the process by which he obtained his earliest. Photographic images niepce niÃ©pce began experimentingâwith lithographic printmaking which led to hisâinvention of heliography because of his inability to draft. images by hand