There is always adoption as well. My wife's family is plagued with non fertile people... Her sister had Ovarian Cancer, and adopted two kids from Taiwan, and her brother & his wife had been unable to have kids as well (No Reason found, both healthy), so they just adopted a brother and sister from taiwan as well.
And for those that wonder why overseas... It is more difficult to adopt in the country than it is out of the country. My wife's sister & her husband have a beautiful house, he is a Police Seargent, she was an IT Professional (Now Stay at home mom), but they could not get approved for adoption. My brother in law is an IT Pro for Aetna, and his wife is a manager at Aetna... They could not get approved either.
Its a fucked up world we live in.