Myself and DP decide to try and start a family.
We have discussed marriage in the future. I am in no particular rush.
I have large savings and earn considerably more than DP at the moment.
We both work locally and in flexible modern businesses where we could both be an equal part in child care.
I am in the position that the child has my surname. DP obviously would want child to have his surname.
I would do so if we were married, but I think the risk of getting married post birth and then minds being changed about marriage (mine or him) would mean I would be more cautious of using DP's surname.
I have been married before, DP hasnt. He wants to get married in future. I on the other hand would love that too, but dont see it as necessary in a security type of way.