CALR and Miscarriage: SS can lead to the involvement of many exocrine glands and tissues, and the placenta is also one of the target organs during pregnancy, and placental dysfunction can occur after injury, and maternal IgG such as anti-SSA, anti-SSB, and anti-nuclear antibodies can also enter the fetus through the placental barrier and affect its intrauterine development, leading to a variety of adverse pregnancy outcomes such as miscarriage, congenital malformations, stillbirth, and preterm delivery.17