Daily Mail has the story...
Catelynn told In Touch she made a conscious decision to stop using birth control three months ago, so she and Tyler could conceive another baby.
'I would’ve felt guilty if I got pregnant again when Carly was one or two. But we’ve both been yearning for this,' Lowell told In Touch, adding: 'We’re ready to have a baby.'
Catelynn, who also starred on MTV's 16 & Pregnant, recalled a different scenario when she was expecting Carly.
'I was too young when I got pregnant with Carly - I was sad and scared,' admitted Catelynn.
'I didn't want to be a teen mom. I'm proud of the choice I made.'
Both are now working full-time jobs caring for developmentally disabled adults near their home in St. Clair, Michigan.
They visit Carly and her adoptive parents Brandon & Teresa Davis two times a year.
E! has more...
The following is an excerpt from Pregnant Teen Mom Star Catelynn Lowell Shares First Baby Bump Photo—Check It Out!
A source tells us that the duo have been planning to have a second child, after they famously decided to give their first baby, Carly, up for adoption and document the process on the MTV series.
The future parents are in the midst of filming their new reality show, which has yet to be named but will undoubtedly follow them as they welcome a child into their home.
An insider tell us that both Lowell and Baltierra's families are "extremely happy and supportive of the new baby."
And while this marks the first time that the stars are speaking out about the pregnancy, the expectant mother's mom April Stotts broke the news via Facebook earlier this summer.
"Gonna be a grandma again," she wrote, while Catelynn's younger brother stated, "Catelynn is pregnant," on his page.
Back in April, Lowell tweeted, "I am an adult and I can tell when I'm ready and idc what ANYONE says I'm gonna do me! We ARE READY for a baby. #HatersGonnaHate."