My sex drive has been the same prior to pg but we have avoided sex due to my history of m/c. So we did nothing in the first trimetser, I think we tried in the second but no go for me then once in this trimester. I was the same when pg with my DD too. I can't remember once we had DD what happened but probably avoided sex due to being sleep deprived and also I think we waited until 6 week check up and for locia to subside...