Often it seems like they all team up and decide - now, now is the time for babies.
Well, some at least a few famous faces out there seem to have got the November memo.
Chris Hemsworth and his wife Elsa Pataky have just announced they are expecting their second child and if there first is anything to go by, they will be ridiculously cute.
Joining the pregnancy party is singer Kelly Clarkson, who appears to have ignored Adele's advice and wasted no time since getting married.
American actress Ginnifer Goodwin has also recently told the world that she and her fiancé Josh Dallas are adding a little one to their family.
Not to mention Emily Blunt and her husband John Krasinski, who told us back in September. She's been showing off her growing bump with pride recently, on a holiday in Hawaii.
There must be something in the air...
Congrats all round!
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