Mandy Moore says she's making changes to her birth plan after learning that her "platelets have dropped exponentially."

The This Is Us actress is pregnant with her first child with her husband Taylor Goldsmith.

She shared a photo from her doctor's appointment on her Instagram Stories with the caption, "Weekly platelet check at the hematologist. My platelets have dropped exponentially during pregnancy and it's sadly altered my birth 'plan.' Any other pregnant folks in the same boat??"

In the photo, Moore is seen wearing a face mask and blue floral top while cradling her belly.

Pregnant Mandy Moore is changing her birth plan after her platelets \u2018dropped exponentially\u2019 Mandy Moore/Instagram

Platelets are cells that help clot blood. Pregnancy can cause a low platelet count, resulting in a condition called gestational thrombocytopenia. According to the American College of Obstetricians and Gynecologists, the condition occurs in between 7 and 10 percent of pregnancies at delivery. The Mayo Clinic says that it's usually mild and improves soon after childbirth.

Birth plans help women feel empowered when planning for delivery. Developing a plan can help you have thoughtful conversations with your partner and provider about the care you'd like and expect.

Despite the best planning, childbirths don't always follow well-laid plans.

We feel for Moore—we know that it can be scary to adapt a birth plan.

The good news is that she and her medical team are preparing as best they can to safely deliver her little boy.

We're sending all our love and support to Moore. You got this, mama.