None of the main actresses in How I Met Your Mother were pregnant during the show's run. However, there were a few instances where pregnancy was written into the storyline:
- Alyson Hannigan (Lily Aldrin) was pregnant in real life during the filming of Season 4. The writers incorporated this into the show, with Lily's pregnancy becoming a major plot point.
- Cobie Smulders (Robin Scherbatsky) also experienced a real-life pregnancy during the filming of Season 8. The writers addressed this by having Robin's character adopt a child from her sister.
While these pregnancies were addressed in the show, it's important to note that none of the actresses were actually pregnant during the filming of those specific scenes.
