I was a vet nurse and I still lifted and did all the heavy duties for a few months, there was a time though that I wasn't able to physically do things anymore, and my body definately told me when. I kept everyone else in the clinic aware of what was going on so they all knew what they could expect from me. I went onto light duties at 27 weeks and at 30 weeks I finished all nursing & did only administration after that. HTH!