A cut Friends storyline would have changed the trajectory of Ross and Rachel's arc and potentially ruined the couple's series ending. The characters, played by David Schwimmer and Jennifer Aniston for 10 seasons of Friends, ended up together in the series finale, but their journey was a complicated one. Ross was stuck in an unrequited love situation when it came to Rachel early in life, but they ended up dating in Friends season 2. Though it didn't last long, the pair fell into a series-long "will they or won't they" scenario.
https://screenrant.com/friends-show-ross-elizabeth-baby-story-rachel-ruin/