-Easier birth control: Make the egg into an omelette
-Relaxed child support laws: Requires deliberate decision to incubate the egg
-Clean packaged periods: Egg = No mess!
Although, there would be stories about partners hiding fertilized eggs: Instead of unplanned parenthood we would have unconsensual parenthood
There’s probably more nuances I am missing. But do discuss it in the comments.
There’s a movie about that. Well, it’s about high-tech incubator eggs that promise relief from the toils of pregnancy so mothers can go on working (so they can afford said proprietary incubator eggs). Not a great movie, but it was interesting. Don’t remember the title unfortunately.