Not recalling the names, I searched for them independantly before I spoke with HR (I wanted to make sure I was correct in my complaint, I was so nervous to approach HR about this issue). In my case, I first approached a supportive female manager of a different division, to help with this issue as well. I was very fortunate that the situation was handled very professionaly, with no backlash. Another thing that helped was I got a health form from my medical professional that listed no work restrictions were necessary. Also, I compromised with our health and safety and modified some of my lab activities that they were concerned about (but I used my judgement to discern if there was ligitamate reason for the concern).
A personal note: I have had two beautiful healthy babies, and I worked in labs all nine months for both of my pregnancies. Obviously I would not recommend any risky behavior, but with all of the modern saftey equipment and regulations, most jobs can be performed in a safe way for both the professional and the baby.
