For several months I have been using minoxidil/Rogaine 5% foam twice daily on my head and beard (I know this was absolutely foolish). My wife is five and a half weeks pregnant and I have halted minoxidil use immediately after finding out the good news last week. She doesn't use these products herself, but has been directly exposed to 5% minoxidil foam through 1) running her hands through my hair more than a few times within a few minutes of application over the last few weeks, and 2) if any was in my semen during conception and a handful of subsequent instances of unprotected sex around that time ~ month ago.
I am very concerned about the guidance that pregnant women should not come into contact with minoxidil at all, potential for birth defects, etc., and my wife had come into contact several times through the ways described above.