It appears Sister Wives star Robyn Brown's latest pregnancy with Kody Brown will have something in common with her first-a delayed due date.

Are The Other Wives Excited For Robyn & Kody? 

The expectant mom took to Twitter Jan. 8 to share that despite being due to give birth to her new daughter, the second biological child she will have with Brown, was late and she was officially past her due date-a sentiment she is familiar with after her son with Brown, Solomon, was also born past his initial due date.

"Hmmm.....due date came and went. When is this little girl going to come?" she wrote.

Kody Posts 'Cynical' Response To Reports That Meri, Janelle & Christine Want To Leave Him

Robyn and Kody announced they were expecting their second child together back in 2014, a few months after it became public knowledge that Kody and his original legal wife, Meri, had divorced, and Kody and Robyn had since legally married. That move was to aid the process of Kody legally adopting Robyn's kids from her first marriage, Dayton, Aurora and Breanna, which fans watched unfold on the recent season of the family's reality show.

Altogether, the arrival of the newest child will be the 18th Brown child. In addition to the five children Robyn and Kody share, he has a daughter, Mariah, with Meri, and six children each with other wives Christine and Janelle. Janelle is the mother of sons Logan, Hunter, Garrison, Gabriel and Paedon, as well as daughters Madison and Savanah. Christine is the mother of daughters Aspyn, Mykelti, Gwendlyn, Ysabel and Truly, as well as son Paedon.

Tags: Sister Wives TLC Reality TV