I have not read all the replys but here is my opinion!
1st while there are some ladies that would rather stay in the nursey with there babies than be in service, you will always have some.
2nd-- most ladies that breastfed would love to be able to go though service and nothave to walk out to feed the baby, as for me most of my time was in the nursey the frist few months of the girls life.
when my oldest was born , our church had 2 other babies born , they were all 3 wks apart. As moms , it seemed we were all in the nursery at the same time feedign our babies! and yes I would take 45 to 60 mins to feed them lol, wonder what our pastor thought!
I think that your ladies in your church needs to speak up about that, yes you will have some who would use any excuse to leave service but hey who cares.
It would be funny for one bold lady to just whip it out in service and feed the little one right there!

May be then he would change his rule.
Sorry but all the chruches I have gone to all the ladies breastfed, and we would have made a huge fuss about it.