All married couples should learn the art of battle as they should learn the art of making love. Good battle is objective and honest - never vicious or cruel. Good battle is healthy and constructive and brings to a marriage the principles of equal partnership.
More and more couples are having this negotiation or discussion but I'm still amazed at the number who aren't and where the cultural norm sort of kicks in and they just assume that mom's got to be the one who stays home not dad.
People with fertility problems are not alone. It is a very very common problem for couples today. I've seen statistics that are just staggering.