@Mongue, my wife is due to deliver our first child in July. After serious consideration we have decided that we will travel back to the UK and have the birth their. I'm not saying that there are no suitable, well equipped hospitals here in Nigeria (After all women have been giving birth here since year dot) it's just that I would never forgive myself if anything happened to my wife or our baby (Nathan Myowa "Surname").
What nationality are you and your partner? For us, if my wife (Nigerian) gave birth in Nigeria our baby would be entitled to a British passport through me (British) however our babies child will not automatically be entitled to the same. So at least if my wife gives birth in the UK our grandchildren will be entitled to residence in the UK. Something you should really think about.
If everything is ok with the pregnancy you can fly to the UK as late as 36 weeks pregnancy, after the birth you can fly almost immediately back. So you don't need months back in the UK.
I'm actually lucky enough to be able to afford the birth in the UK (I am no longer a UK resident due to my time in Nigeria therefore my wife and I are not covered by the NHS). So we will have a home birth in the UK!
I pray everything works out for you as you wish.

It's not an easy decision to make is it!