Back in (probably) the 1980s I read a short story or novella (English, US) set in an all-female society where people reproduce by parthenogenesis. Eventually their scientists re-create the Y chromosome (or at least the SRY gene) and create a (bearded) man via IVF; one of the primary characters describes him as
"the ugliest woman I had ever seen"
However, she was the sole survivor of a genetically identical family that had been wiped out by an epidemic that they were unable to resist (she had been away, (at university?) and was not exposed), so she feels that the ability for at least a portion of births to be by genetic re-assortment of chromosomes would be a good thing.
(If memory serves me correctly, they relied on sexual reproduction, like some all-female lizards, where hormones generated by sexual activity triggered an egg to divide; the protagonist's girlfriend doesn't understand why reintroducing men is a good thing.)
I don't recall any discussion of why or how humanity lost sexual reproduction, but clearly (to my memory) the various clone families are the remnants of the kind of diversity that only comes about through sexual reproduction; they don't just have different disease resistance profiles, but have different appearance, what one might think of as different ethnicities.
I've ruled out Who Needs Men? by Edmund Cooper -- that has a theme of deliberately exterminating men. Also, the created male is a child, and I strongly remember the description of the created man as an adult with a beard.
Thanks for the suggestion of Herland, that will be interesting to read, but that is a story told from the perspective of male travelers who find an all female society and does not match my memory at all.
Someone suggested He, She, and It, which is a fascinating read but not what I'm looking for. (The "It" is interwoven stories including a cyborg and a golem, with a strong Jewish theme.)
While the Otherwise award (originally known as the James Tiptree Jr. Award) showcases a massive trove of explorations of gender, it was first awarded in 1991, and I almost certainly read this story before 1991.