Association between early βhCG kinetics, blastocyst morphology and pregnancy outcome in a single-blastocyst transfer program

Early β-hCG kinetics after single-blastocyst transfer is different according to pregnancy outcome and is only slightly influenced by blastocyst quality. These results confirm the interest of β-hCG follow up in IVF pregnancies, and do not support the interest of building blastocyst-specific β-hCG ranges in IVF cycles.