19 Kids and Counting's Anna Duggar, wife of eldest son Josh already has three kids and another baby girl on the way, but she admitted that her sister-in-law Jill Duggar - who is new to motherhood - actually has a lot more knowledge about babies and pregnancy compared to her.

The Duggar Family Blog shared a video made by Josh and Anna following the announcement of their fourth child's gender. Josh said that even though his sister Jill and wife Anna are both pregnant at the same time, it still feels totally different.

Anna enjoys being pregnant with her sister-in-law, and shared that they have really bonded over pregnancy talks. "It's been a lot of fun," said Anna. "Jill has so much knowledge because she's a midwifery student."

Jill's knowledge is so impressive that it even beats that of Josh's wife, who has already given birth three times already.

"She's feeling pregnancy for the first time so we definitely bounced a lot of ideas off each other and she definitely has a lot of helpful tips. I'm jealous that she knows so much as a first-time mum. It's amazing," Anna laughed.

The Duggar Family Blog also shared the latest picture of Jill, who is 37 weeks pregnant. "This will be one of the last (and perhaps the very last) photos of Jill Dillard's baby bump," they wrote. "She is 37 weeks pregnant. Baby Dilly is getting ready to make his big debut. Jill and Derick plan to have a home birth but have not announced how much of it will be filmed. Stay tuned!"

While Jill is well-versed with babies, her husband Derick Dillard has no clue as to how to care for one so he will be experiencing everything for the first time with Baby Dilly - including changing diapers.

But Jill has no doubt that Derick will step up to the role of fatherhood with ease.

"Derick's great at helping me with relaxation, and really good and supportive," Jill told PEOPLE. "He's an amazing husband, he'll be awesome when our baby is born – he already is."