Of vastly more concern to me is the fact that the majority of the chemicals you use have never been evaluated for reproductive and developmental effects.  When you get those nice Sigma Aldrich SDSs, go to Section 11 and see what you find under:

Check these for all the chemicals in your experiments. Notice, that these SDSs do not include tests for damage to the fetus. None of the occupational standards do.  Then add to this that all neurotoxic chemicals such as the solvents almost surely can affect brain development in the fetus at any stage. 

We're flying blind here and talking like we are far sighted.

I shall continue my policy of advising women to make choices between being pregnant and doing tasks which expose them to potentially toxic chemicals. 

So shoot me.

If you want to do this in a way that works, set up a data base of Section 11s on each of the chemicals used in the entire semester.  Give students access to this so they can see how very little is known about most of the chemicals. Explain the Precautionary Principle (as opposed to chemicals are innocent until proven guilty) and some of the students will have the brains to see the implications.

I know, because I have just done this for the 8 theatrical special effects smoke, fog and haze chemicals.  Very sobering when you see that there is almost no data by inhalation and that is the route for these chemicals.  Even non-chemists can get it when you do it this way.