WhenDoesLifeBegin.org hosts a database of over 300 sources that affirm the humanity of human zygotes, embryos, and fetuses. Below, you will find a downloadable report with 152 scientific sources, 27 legal sources, 29 pro-life sources, 71 pro-choice sources, and various others that prove this view. From medical textbooks to federal court cases to speeches by abortion doctors, there is overwhelming support for the scientific consensus view that a human's life begins at fertilization.