The Fifth Vital Sign: Master Your Cycles & Optimize Your Fertility
| Country | USA |
| Binding | Kindle Edition |
| EISBN | 9781440626487 |
| Format | Kindle eBook |
| Label | Penguin Books |
| Manufacturer | Penguin Books |
| NumberOfPages | 324 |
| PublicationDate | 2004-02-24 |
| Publisher | Penguin Books |
| ReleaseDate | 2004-02-24 |
| Studio | Penguin Books |