Increased risk of pregnancy-induced hypertension in young recipients of donated oocytes Debbra A. Keegan, M.D., Lewis C. Krey, Ph.D., Hung-Chi Chang, M.D.,

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Increased risk of pregnancy-induced hypertension in young recipients of donated oocytes Debbra A. Keegan, M.D., Lewis C. Krey, Ph.D., Hung-Chi Chang, M.D., and Nicole Noyes, M.D. Division of Reproductive Endocrinology and Infertility, NYU School of Medicine, New York, New York Fertil Steril 2007;87:776–81. ©2007

Objective: To assess the rates of select obstetric outcomes in oocyte donation (OD) recipients aged 35 years and >40 years and compare them to similarly aged IVF patients.

Result(s): Response rate was 60%. The OD recipients had significantly higher rates of pregnancy-induced hypertension (PIH) than their IVF counterparts. The OD 35 years had the highest rate (42%), followed by OD 40 years (26%), IVF 40 years (14%), and IVF patients 35 years (12%). In twin pregnancies, the rates of PIH remained higher in the OD groups: OD 35 years (56%), OD 40 years (36%), IVF 40 years (25%), and IVF 35 years (22%). Twin pregnancy rate was lowest in IVF patients 40 years (19%) and a lower preterm delivery rate (16%) reflected this difference. The cesarean section rates were 50% for singleton and 78% for twin deliveries in the OD patients 35 year; in OD patients 40 years, the rates were 75% and 84%, respectively.

Conclusion(s): The OD recipients are at higher risk for untoward obstetric outcomes than their IVF counterparts. Young OD recipients reported the highest rate of PIH, warranting further investigation into an association between early loss of ovarian function and PIH.

We propose a “stage 0” in which embryonic–maternal interactions determine the pattern of endometrial invasion through as yet, unknown factors. Secretory products of the maternal endometrium and the embryo’s trophectoderm likely play a role in these interactions. In OD recipients, these interactions may be altered by the genetic incompatibilities of the mother and embryo, leading to successful yet suboptimal invasion of the maternal endometrium. This, in turn, may lead to poor placentation and eventually oxidative stress on the placenta and PIH by these mechanisms. Furthermore, other immunologic factors in young patients with ovarian failure may amplify the risk. Studies designed to investigate the embryo’s role the early placentation may provide important information about the genesis of PIH.