Question Summary:
Giving up guardianship of a child

Question Detail:

 I've read a previous answer where it was deemed permissible to hand over guardianship of a child provided both parents agree to forfeit their right over the child in favour of someone else. I would like to know whether it's permissible to conceive a child with that intention, i.e. of giving him/her up for adoption to a couple that do not have a child.  

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
It is permissible for a husband and wife to conceive a child with the intention of handing over the child to someone else for adoption. However, the child’s lineage will still be established to his father. Furthermore, the adoptive parents and adopted child will not be considered heirs unto one another.[1]  
And Allah Ta’āla Knows Best
Hisham Dawood
Student Darul Iftaa
Chicago, USA 
Checked and Approved by,
Mufti Ebrahim Desai.