Jessa and Ben's second bundle of joy is due in February
jessa seewald

Jessa Duggar is only nine weeks away from welcoming baby No. 2!

To document her progress, the Counting On star shared a side-by-side snapshot of her second baby bump compared to Spurgeon —now 1 — in the womb at 31 weeks.

“1st, 2nd.#31Weeks #BabySeewald2,” Jessa, 24, tweeted on Thursday.

Just six weeks ago, Jessa compared her progress at 25 weeks with two similar side-by-side snaps. “first – second.#25weeks,” she captioned the photo with arrows pointing to the two pictures.

Jessa and her husband Ben exclusively revealed to PEOPLE in August that they are expecting their second child, due in February 2017. “We are overjoyed to announce that Spurgeon has a new title in life as ‘big brother!’ ” the couple, who wed in November 2014, said in an exclusive statement to PEOPLE. “We are so thankful that God is adding to our family.”

And although the sex of the baby has yet to be revealed, deciding a baby name is on the to-do list for the couple. “We really have no ideas for names at this point,” Ben said on the TLC series. “So, maybe we will have to get some suggestions at some point.”

Sister Jinger Duggar, who wed Jeremy Vuolo in November, recently photographed the growing family’s exciting new season of life with a shoot of the trio — and captured Jessa’s growing baby bump!

Jessa shared a sneak peek at the Seewald Family 2016 photo album on Instagram. “So many milestones this week for our little family! I’m overwhelmed by God’s kindness! Nov 1st @ben_seewald and I celebrate our anniversary, Nov 3rd baby #2 enters the 3rd trimester, and Nov 5th #SpurgeonElliotSeewald celebrates his 1st birthday! Thanks to Jinger for doing this photo shoot with us!” she captioned the photo.

Counting On airs Tuesdays (8 p.m. ET) on TLC.