Like introduce a pregnancy and what not!

How about the show it was named after? HD ran another 5 or 6 seasons.

Monica and Chandler hooking up in London.

Ross and Rachel getting hitched in Vegas during a drunken blackout.

Phoebe giving birth to her brother's triplets.

Rachel having Ross's baby by use of flashback.

The "Manny Quinn" and Ponzi scheme thing, the beginning of the end for "Two and A Half Men". It jumped the shark, and went on but was never the same.