%0 Journal Article
%T A live birth with unexpectedly low serum human chorionic gonadotropin level on day 11 after blastocyst embryo transfer: a case report.
%A Zheng Q
%A Xu S
%A Mo M
%A You J
%A Zeng Y
%J F S Rep
%V 1
%N 1
%D Jun 2020
%M 34223212
暂无%R 10.1016/j.xfre.2020.04.005
%X <B>UNASSIGNED: </B>To report a very rare case of live birth with unexpectedly low serum hCG level on day 11 after blastocyst embryo transfer.<BR><B>UNASSIGNED: </B>Case report.<BR><B>UNASSIGNED: </B>Private infertility center.<BR><B>UNASSIGNED: </B>A 30-year-old nulliparous woman presented with PCOS and 1 year of infertility.<BR><B>UNASSIGNED: </B>Conventional IVF was scheduled and a long-acting agonist protocol was selected.<BR><B>UNASSIGNED: </B>Maternal serum hCG levels and transvaginal ultrasound exams for the embryo's well-being.<BR><B>UNASSIGNED: </B>The hCG level was 11.6 IU/L on day 11 after the transfer of two blastocyst embryos, which was considered as either failing or extrauterine pregnancy. After blood titration, there were delayed hCG increases. A series of transvaginal ultrasounds also indicated a delayed but normal-appearing intrauterine pregnancy. A healthy baby boy was delivered at term by means of cesarean section.<BR><B>UNASSIGNED: </B>A low initial serum hCG level may be associated with certain maternal or fetal characteristics and IVF treatment variables. Close conservative observation is warranted before undertaking any therapeutic intervention.