No worries! It can take up to 24 hours for an egg to be fertilized. From there the embryo needs about a week to work from the ovary through the fallopian tube and get to the uterus.
The term thagomizer was coined by Gary Larson in humor, in a 1982 Far Side comic, in which a group of cavemen in a faux-modern lecture hall are taught by their caveman professor that the spikes on a stegosaur's tail are so named after the late Thag Simmons.
A few words are first attested in Shakespeare and seem to have caused extra problems for the typesetters. This suggests they are really coined by Shakespeare. One example is denote. The popular book Coined by Shakespeare acknowledges that it is presenting first attestations rather than certain inventions.