1. Sperm meets egg;Block;Sci. Digest,1981
2. It's a girl! Is sex selection the first step to designer children?;Fackelmann;Sci. News,1998
3. The good egg: Determining when life begins is complicated by a process that unfolds before a sperm meets an egg;Hall;Discover,2004
4. A boy or a girl: Is it possible to load the dice?;Ridley;Smithsonian Magazine,1993
5. A man's job: A surprise delivery from sperm to egg;Travis;Sci. News,2002