Jinger Duggar is sharing her pregnancy journey with her fans, and the reality TV star recently took to Instagram to post updates on baby Vuolo.

Duggar's Baby Bump

The 19 Kids and Counting star, who is married to former soccer player and Texas pastor Jeremy Vuolo, shared a picture of her growing baby bump on the social media platform on Saturday, Feb. 17.

The photo shows Duggar wearing a dark grey dress with her baby belly on display for her 700,000-plus followers on Instagram.

The 24-year-old can be seen posing in front of a blackboard, which reveals that she's 18 weeks pregnant and the baby's size is currently equivalent to the size of a bell pepper. "Update on Baby Vuolo," she captioned the image.

A post shared by Jinger Vuolo (@jingervuolo) on Feb 17, 2018 at 6:44pm PST

Duggar has not yet revealed the gender of the baby. However, the color of the chalk used to write the words on the board led some fans to believe she's expecting a boy.

"Boy.. Blue chalk gives it away for me, sending well wishes & Congrats," commented one user.

"Does the blue chalk you used for the word baby mean your having a boy?" another fan asked.

This isn't Duggar's first pregnancy update. A few weeks ago, Duggar, who is the sixth eldest child of Jim Bob and Michelle Duggar's 19 kids, took to Instagram to reveal the same information on the chalkboard. "15 weeks," she wrote at the time, before adding that the baby had grown as big as an apple along with an illustration of the fruit.

Duggar and Vuolo's Baby Announcement

Last month, Duggar and Vuolo announced that they were expecting their first child together after tying the knot in November 2016.

"We both looked forward to the joys of marriage but neither one of us fully understood just how amazing the start of this journey would be," they told US Weekly at the time.

"Now, the journey has taken an exciting turn: we are expecting our first child! We are praising God for this beautiful gift and ask that you join us in praying for a safe and healthy pregnancy."

The couple's baby announcement came on the heels of another Duggar family member's pregnancy reveal. In December, Jinger's brother, Joseph Duggar, and his wife, Kendra Caldwell, officially announced that they too had a bun in the oven.