Currently, egg retrieval is a significant part of the IVF process - one that's notoriously taxing on the women. Once this gets refined enough for clinical uses, it can become as simple as "take a blood sample once, produce as many eggs as you need". With an added benefit of being able to get eggs when traditional retrieval fails.

Can we stop adding unnecessary JS to website to stop global warming by calculating AND ALTERING SCROLL?

The reason is that genetics/evolution don't yet seem to fully explain how humans exist. A computer genetic algorithm run for a billion generations doesn't lead to anything anywhere near the the complexity of a human.

I suspect there are as-yet undiscovered effects which shape the next generation. Whether that be DNA methylation, gut bacteria passing from mother to child, selection of the 'correct' egg or sperm out of millions, or something new and un-discovered etc.

And if those effects are bypassed with artificial conception, we might end up with humans which aren't as strong, aren't as smart, aren't as well adapted to a changing environment, etc.

The effect will be small for each generation, but after 5-10 generations of a combination of artificial and natural conception you could end up with meaningful loss of fitness - or perhaps a lack of gain of fitness that would have otherwise occurred.

(Hmm, I wonder if this can be done for chicken eggs)

Shinya Yamanaka created iPSPs in 2009:

https://en.wikipedia.org/wiki/Shinya_Yamanaka

Guess the japanese excel at micromanaging. Although one could say that the research here in the article is more epic than Shinya's discovery, but I remember having watched one of his presentation and it convinced me of pure epicness, if you understand how his team found the "Yamanaka factors". That was by human (work) consistency. About as epic as Christiane Nüsslein-Volhard and her mutant screens, that also involved tons of micro-experiments.