OMG! Someone actually took notice of a post of mine!
<Fainting>

It was all over the news at one point...., But here is a website that
talks about it:
http://www.babycenter.com/expert/preconception/gettingpregnant/1336322.html

Question: Can taking cough syrup help me conceive?

Answer: While there's not a lot of medical research to support this
idea, anecdotal evidence suggests that it can help. But there are a few
caveats, too. One ingredient in certain cough syrups - guaifenesin - can
help you get pregnant by thinning your cervical fluid, which enables
sperm to travel through your cervix and fertilize an egg. If you know
from taking your temperature every morning that you're ovulating, but
you don't seem to be producing much wet, slippery, cervical fluid,
guaifenesin might be all the help you need to get pregnant. This is the
paradox, though: You need to know when you're approaching ovulation to
take advantage of this recommendation, and the only way to know that is
by checking your cervical fluid. So guaifenesin works best on women who
do produce at least some cervical fluid.

How does it work? Guaifenesin, a common ingredient in cough syrups, is
an "expectorant." That is, it relieves congestion by helping liquefy
mucus in your lungs, allowing you to cough it up. And because it works
systemically on all mucous membranes in your body, it can make your
cervical fluid wetter, too.

The trick is to find a cough syrup in which guaifenesin is the only
active ingredient, so check labels carefully. Many cough and cold
medicines contain antihistamines that also work systemically in your
body but have the reverse effect: They dry up mucus and diminish wet
cervical fluid. And while you're trying to get pregnant, there's no
reason to expose yourself to any other drugs unnecessarily, so find a
product that contains only guaifenesin and no other active ingredients,
including dextromethorphan (a cough suppressant) and alcohol. Humibid
LA - the pill form of guaifenesin, available by prescription - is a safe
choice. Ask your healthcare provider to prescribe it for you.

If you're taking the liquid form of guaifenesin, take 2 teaspoons three
times a day around the time of month you're expecting to ovulate. If
you're taking the pill form (Humibid LA), take it as prescribed for a
cold. Either way, I would encourage you to take it from the first day
you notice any type of wetness through the day of your temperature
shift. That may be about a week. (Editor's note: If you're not yet
charting your basal body temperature, click here for more information on
how to do it.)

Guaifenesin may even work for women who've had abnormal cervical cells
frozen off or who've had a cone biopsy - the removal of a cone-shaped
wedge of the cervix to treat lesions that may be precancerous. This
procedure destroys some of the cervical crypts that produce fluid. If
this is what's behind your low production of cervical fluid, taking
guaifenesin might help you produce enough wet, slippery fluid through
the remaining cervical crypts to help you get pregnant.

Guaifenesin may even work for women who've had abnormal cervical cells
frozen off or who've had a cone biopsy - the removal of a cone-shaped
wedge of the cervix to treat lesions that may be precancerous. This
procedure destroys some of the cervical crypts that produce fluid. If
this is what's behind your low production of cervical fluid, taking
guaifenesin might help you produce enough wet, slippery fluid through
the remaining cervical crypts to help you get pregnant.

And heres a site from a Doctor:
http://www.pregnancy.org/article.php?sid=1102

Google for more...