| title | ISBN-13 | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Die wunderbare Welt des Ungeborenen | 978-3-87827-068-3 | 1987 | David M Rorvik | |
| How to Choose the Sex of Your Baby | 978-0-385-48562-3 | 1996 | David M. Rorvik | |
| How To Choose The Sex Of Your Baby | 978-0-385-24442-8 | 1989 | ||
| How to Choose the Sex of Your Baby: Fully revised and updated | 978-0-7679-2610-2 | 2006 | David M. Rorvik | |