Can pregnancy be contagious among friends? Science says yes, and so do some staff at a hospital in Maine where nine nurses from the Labor & Delivery Unit were all expecting at the same time, and now they are all mamas.

About 5 months ago, after one of the nurses posted a photo of 8 of the 9 mamas-to-be the sweet pic quickly went viral.

Soon local news stations picked up the story of the baby boom on the L&D unit at Maine Medical Center.

“It’s really nice coming to work and seeing other people who are just as pregnant and watching their bellies pop and just talking about these experiences that we are going through together,” one of the nurses, Amanda Spear, told WMTW.

“I feel like every other day we would come into work and it would be like, ‘someone else is pregnant,'” Spear told NBC.

Another of the nurses, Erin Grenier, said that with every pregnancy announcement the staff got more and more excited for each other.

Nurse Brittney Verville couldn’t believe the photo she posted to Facebook before resting up for the night shift got thousands of likes and shares. “When we woke up we’re like, ‘oh my gosh I think we’re viral,'” she told NBC.

Now, the mamas are going viral again, as a picture of the babies is blowing up, even making it to CNN.

The youngest is 3 weeks old and the oldest is 3½ months. The mamas are already getting them together for playdates. The photographer who snapped the viral pic, Carly Murray, told CNN she hopes one say these kiddos understand how important the work their mamas do is.

Congrats to the nurse of the Maine Medical Center Labor and Delivery Unit!

[A version of this post was originally published March 26, 2019. It has been updated.]