Amber, Catelynn, Farrah and Maci return more than five years after their Sixteen and Pregnant debuts

In the five years since MTV’s Sixteen and Pregnant introduced moms-to-be Maci Bookout, Amber Portwood, Catelynn Lowell and Farrah Abraham to the world, so much has changed – yet so much has stayed the same.

In the first trailer for next month’s Teen Mom OG, obtained exclusively by PEOPLE, we catch up with the original crew as they once again announce pregnancies, engagements and unwelcome returns.

Oh, and the “babies” are cuter than ever!

So what’s happening with the girls?

Amber is relishing her freedom and starting a new relationship, but ex Gary Shirley – the father of Amber’s daughter Leah – is expecting a new baby with another woman, and it’s sure to cause friction.

Also expecting? Maci and Catelynn. Maci, who would later walk away from a terrifying car accident (which is not shown in the promo), is in a new relationship, but her ex Ryan continues to be a source of tension for Maci, her new boyfriend and her son Bentley.

Life is much happier for Catelynn and fiancé Tyler Baltierra, who let viewers inside the painful process of giving up their daughter Carly for adoption. Having steadied their relationship and pursued their education, they’re able to embrace parenthood as adults.

Also hoping for a second chance is drama queen Farrah, who unexpectedly returns (with newly plump lips), much to the other girls’ displeasure.

Maci appears to respond most negatively to the news, saying, “You guys can leave now. This is over.”

Will Farrah’s return rip the Teen Moms apart once and for all? And can we see more babies already?

Find out when Teen Mom OG premieres March 23 at 10 p.m. ET on MTV.