Adult Shauna and Jeff have never mentioned the child during the show — though Jeff seemingly knows the pregnancy happened since he read all of Shauna's secret journals.

Source: https://www.popsugar.com/entertainment/shaunas-baby-yellowjackets-49124077

If that were the case, then it means that the wilderness would want to display its power by inducing Shauna's labor at this key moment, shortly after she boldly proclaims that she basically doesn't believe in any of it.

Source: https://screenrant.com/yellowjackets-season-2-episode-5-questions-theories/

Shauna's baby remained a question mark until season 2, episode 6, which finally revealed its tragic fate.

Source: https://screenrant.com/what-happens-to-shaunas-baby-in-yellowjackets/

They agree to cremate Jackie's remains despite Shauna's weak protests.

Source: https://www.cbr.com/yellowjackets-season2-episode2-recap-spoilers/

With both Callie and Jeff, subverts audience expectations, using their reactions to Shauna's actions to further explore their love for her.

Source: https://mashable.com/article/yellowjackets-s2-callie-sarah-desjardins