My husband also ate baby's 胎盤 in HK around 1977-78. My 99 said she bought from a senior nurse/ maid worked in a HK hospital. It was believed that it can be cured 哮喘 for husband at that time.
Even for nowadays, 99 is proud of doing this soup.... . My husband is also glad to mention he "can take it ".
Before this news, I quarred with him not to mention this such "horrible soup ". It is definately not of a honour but a shame.