Echinacea has long been popular for colds and flu because it may help boost the immune system. It appears to be antiviral and stimulate T-cell production, very useful for a cold. However, it may also inhibit hyaluronidase, and this could factor in to decreasing your odds for conception.
For those of you who would like an E-book version of my columns from Bellaonline, you got your wish! I have compiled my columns into a book of Conception Tips, and it's organized to make it more useful. I also included a special section on surviving IVF, should you go that route.