How I Met Your Mother Season 6 Episode 6 (How I Met Your Mother s06e06) with title “Baby Talk” aired on Monday, October 25th 2010 at 08:00 pm via CBS Network.
Here is summary for How I Met Your Mother Season 6 Episode 6 :

Marshall and Lily research how to conceive a baby with the gender of their choice. Meanwhile, Robin is growing more and more irritated by her perky new co-anchor, Becky.