Induction at gestation day 7 led to abortion and loss of pregnant mice. My suspicion is that my route of exposure intraperitoneal at 5mg/Kg was too high and this has been used previously by other studies in literature.
I suggest you do a pilot study. Start with 1mg Cd /kg bd wt using a single rat followed by 2,3 ,4 and 5 (ip). If that fails change the route of administration, use the subcutaneous route.