I think she meant surrogacy and adoption?
New York New York has adoption (I think, didn't read it)
http://www.mangago.me/home/mangalist/73850/ not all are realistic but they give me mature vibe.
http://www.mangago.me/read-manga/sex_pistols/
They used scientific way by putting artificial ovary or something so a guy can be pregnant.
try actinia
(▰˘◡˘▰)
Hi! any realistic yaoi please or any yaoi manga were couple considered scientific way to have their own baby!