It is worth noting that artificial insemination, using frozen donor sperm, had been around for a few decades at the time of the novel's writing, and by the time the film was made, stored donor ova and embryos are established medical technology. Did nobody think to save some or use them? In the film, at least, this might be answered if the mass infertility is due to problems with implantation, meaning that the stored ova and embryos are useless unless/until somebody comes up with an artificial womb, but...
Isn't that more of a "it just bugs me" thing? Anyway, in the movie, it wasn't just that women couldn't get impregnated, the problem was much worse than that.. Remember, the moment shit hit the fan, ALL women around the world suffered miscarriages.
The mention that the women suffered miscarriages also bugged me. They could have easily just said that woman can't become pregnant. From that line, not only could they become pregnant, but they would just miscarriage before they could carry it to term. So why isn't anyone assuming that's just what's going to happen to Kee's baby? It will just miscarry just like all the others apparently did. It might as well be supernatural, like the Rapture if that's the case.
Because nobody has even gotten pregnant, miscarriage or not, in over 18 years. They explicitly state that the fetus is alive and well in her womb, too, and not a stillbirth. even though she's days away from due. It's enough to give people hope.
I would also argue that WHY nobody can have children is irrelevant. The film is about humanity, and how they react.
All the fertility techniques require a functional, fertile womb. It may very well be that women are infertile in that way, meaning no embryo implantation and/or development will happen even after artificial insemination or other method.
In the book it was the men who were infertile I believe. The movie changed it to the women.
Probably because if it was men who were infertile, chasing Kee would be more about identifying, tracking down, and controlling the guy who knocked her up than about capturing her, specifically.
To answer a few headscratchers:
The Novel says that the sperm count (worldwide) dropped to 0.
To answer the fertility points, the movie and the novel doesn't so much say it was "infertility" but it was more so "sterility", where they can't reproduce at all, though the movie combines the two (yes, actually, those terms are distinct, medical wise——regardless they mean "unable to have kids", though for slightly differing reasons).
As far as using donor sperm or in-vitro goes, frozen sperm, eggs, or, for that matter, embryos can only stay viable for a set period of time between freezing and usage. In that subject, since the last person born was 18 years old by the time of the story, this would make you wonder on the subject of adoption, though that's probably answerable with a falling birthrate.
Taking Kee away
Why does Luke tell Patric to wait to execute Theo and his men until Kee is taken away? First of all, Kee already has had the baby, so there's no real need to worry about her feelings anymore. Second of all, Kee already knows Luke and the Fishes are cold blooded killers because she knows they carried out the hit on Julian. So what difference does having her see a few more murders make?
, medical wise——regardless they mean "unable to have kids", though for slightly differing reasons).