Eggs shared, given, and sold.
D003431:Cross-Cultural Comparison; D005260:Female; D005307:Fertilization in Vitro / Q000331:legislation & jurisprudence / Q000379:methods*; D006801:Humans; D040541:Marketing / Q000191:economics / Q000941:ethics; D018587:Oocyte Donation / Q000191:economics / Q000379:methods*; D006113:United Kingdom; D014481:United States