Platelet counts reduction occurs throughout pregnancy, with 5-12% of pregnancies being diagnosed with gestational thrombocytopenia (GT), characterized by a decrease in platelet count during pregnancy. However, the underlying biological mechanism behind this altered platelet count phenomenon and GT remains unclear. Here, we utilized sequencing data from non-invasive prenatal test (NIPT) among 100,186 Chinese pregnancies and conducted the hitherto largest-scale genome-wide association …