The pregnancy testing has been tested on livestock (opposite result, pregnancy inhibits growth)

https://www.researchgate.net/publication/280624411_Germinati...

http://www.veterinaryworld.org/Vol.3/March/Seed%20Germinatio...

The Magician and Leech by Warren R Dawson doesn't seem to be online. Which makes it seem like a pretty cool book.

I see no proof their was an ancient Egyptian pregnancy test, all articles seem to revolve around the one story. Seems like a back history story.

Hieratic Papyri from Kahun and Gurob is online (page 11 onwards for the gynaecological scrolls, it's interesting)-

http://www.etana.org/sites/default/files/coretexts/15145.pdf