A pregnancy test detects the presence of the pregnancy hormone human chorionic gonadotropin, or hCG, in a person’s body. But the body doesn’t produce that hormone until several days after conception.

The following references illustrate the fact that a new human embryo, the starting point for a human life, comes into existence with the formation of the one-celled zygote: "Development of the embryo ...

A pregnancy test detects the presence of the pregnancy hormone human chorionic gonadotropin, or hCG, in a person’s body. But the body doesn’t produce that hormone until several days after conception.

Could a winter conception shape your metabolism for life? A Japanese study reveals that exposure to cold before conception may ‘pre-program’ your body to burn more calories decades later. Study: ...

Conception can happen within minutes or up to five days after sex, depending on when you ovulate. Identifying your fertile window and when you ovulate can improve your chances of conceiving if you are ...

A decades-old Missouri law states life begins at conception, which some IVF patients worry puts the procedure at risk. Fertility lawyer Tim Schlesinger said court cases protect the in vitro ...