Maternal Outcomes in Oocyte Donation Pregnancies
Summary
Oocyte donation has become a mainstay of assisted reproduction for women with diminished ovarian reserve or other infertility causes. While clinical success rates are high, pregnancies conceived with donated eggs carry a distinct maternal risk profile. Compared with spontaneous or autologous in vitro fertilisation pregnancies, oocyte donation is consistently associated with elevated rates of hypertensive disorders, notably gestational hypertension and pre-eclampsia. Additional complications include first-trimester bleeding, placental abnormalities, oligohydramnios and postpartum haemorrhage. Caesarean delivery and induction of labour are more frequent, reflecting both obstetric caution and increased comorbidity. Immunogenetic factors are thought to underlie these observations: the completely allogeneic fetal genome challenges maternal tolerance, prompting altered cytokine balance, regulatory T-cell responses and placental expression of immune-regulatory ligands. These changes appear to affect vascular adaptation and placental development, offering mechanistic insight into the heightened risk of pre-eclampsia. Clinical management protocols now emphasise preconception counselling, tailored surveillance of blood pressure and placental perfusion, and timely intervention to safeguard maternal well-being without undermining neonatal outcomes.
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Maternal Outcomes in Oocyte Donation Pregnancies publication trend
The graph below shows the total number of articles in maternal outcomes in oocyte donation pregnancies across all publications each year (not limited to Nature Index journals).
Technical terms
Oocyte donation: Assisted reproduction technique in which eggs from a donor are fertilised and transferred into a recipient’s uterus.
Pre-eclampsia: Pregnancy-specific syndrome characterised by hypertension and proteinuria, reflecting widespread endothelial dysfunction.
Human Leukocyte Antigen (HLA) mismatches: Differences between maternal and fetal cell-surface proteins that influence immune recognition.
Regulatory T cells: A subset of immune cells that modulate tolerance to the semi-allogeneic or allogeneic fetus.
References
- Pregnancy by Oocyte Donation: Reviewing Fetal–Maternal Risks and Complications. International Journal of Molecular Sciences (2023).
- Different immunoregulatory components at the decidua basalis of oocyte donation pregnancies. Human Immunology (2021).
- The development of preeclampsia in oocyte donation pregnancies is related to the number of fetal-maternal HLA class II mismatches. Journal of Reproductive Immunology (2019).
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