Abi Dem Born you for inside Marriage? What about those who waited to be married before they will start having kids and ends up not having one. It is only God who has program this life the way it is.
Anyway, most of the things you talked about are even beginning to change even in African society so we don't even need to worry about them anymore.
Regards to children and bearing kids, it is totally in the hands of God. You will see rich family without a child while a poor family has plenty of it and rejecting.
This is a dilemma to say the least but however, why I alluded that some of the things have started changing is that, in African society now, legal adoption of kids is now prevalent so no family has any excuse to give for not having a baby in the house after they have tried by themselves with no avail and the children from such adopted background are no longer stigmatized because almost in every extended family, you get to see a family member or someone close with adopted baby, so why the stigma and you see that is going away gradually.
Also in the past, there use to be segregation on the sex of a child because of certain benefits like being a heir to the father and inheritance purposes but now, in some states, county etc, they have really played down on those sex and even gender responsibilities because things have really changed and people have to move on, enjoying the good radiance of life. In some places in Africa, they now tell you a child is a child no matter the sex.