No you can post on both boards if you like. The parenting after a loss board (one day i will make it there. ), i think is more geared towards talking about dealing with being a parent after a loss and as a result involves a lot more discussion about children.
This board is more of a safe haven for those who have suffered a loss, whether they have other children or not, and also whether the loss is recent or a long time ago. For that reason there are more stringent rules about things. Not about what can be discussed, but more of a consideration for those of us who use the board for whom the loss might be painful still.
This is the reason we ask that any topics posted that might be unexpected for some, such as TTC, living children, pregnancy etc. are headed up properly as a warning in the post title. (TTC MENT, L/C MENT, PREG MENT etc.)