Yes, rotating insecticides is a good idea to prevent resistance although this normally takes years to happen. Some customers rotate every year or when they start to notice the product may not be working as well as it once did. It would not hurt to use another active ingredient. A great alternative to Suspend SC is Talstar P.
Suspend SC can be used around pregnant women. However, we recommend that you stay out of the treated area until it has completely dried. If you feel as though it has caused other effects on you, we suggest you follow up with your doctor.