I agree that couples should adopt rather than go in for fertility procedures. To ask about the caste of the child is very sad.
But I must add here that these days, it is not easy to adopt, atleast in Kerala. The central state agency has 81 couples who have alreday been waiting a year. If you approach orphanages like Mother Theresas's Missionaries of Charity, they also have looonnggg waiting lists. Another interesting fact in Kerala is that the number of female children available for adoption has reduced drastically. More male children, especially older male children are available for placement, but not preferred by couples.
Ofcourse, private nursing homes can give you a child in a week, but that is against the law.