The step between conception and implantation is not in language of the Scripture. In this sense the language of the Bible is describing what it observes about the gestation process. 

Some of the world’s most prominent scientists and physicians testified to a U.S. Senate committee that human life begins at conception: A United States Senate Judiciary Subcommittee invited experts to testify on the question of when life begins. All of the quotes from the following experts come directly from the official government record of their testimony.