We have been TTC dc5 for a while now, with DC4 having been a second trimester pregnancy loss. (Post mortem was carried out and the cause of death wouldn't affect any future pregnancies) I'm 37, and we have 3 living children so we wouldn't pursue any kind of fertility treatment but is there anything simple that could be preventing pregnancy? I have regular periods and get positive opks at about the right time so nothing seems to be wrong. Our other children were conceived within 3 months of trying.