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August 20, 2026Reproductive and Developmental MedicineOpen Access

Excessive estrogenic environment during preimplantation disrupts embryo transport and development and differentially alters the transcriptomes of mouse oviduct and uterus

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Authors

SXShuo XiaoRutgers, The State University of New JerseyHDHonglu DiaoHubei University of MedicineTZTong ZhouQingdao University

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Implication

Animal study demonstrates that preimplantation estradiol exposure induces oviductal embryo retention and transcriptomic changes in mice, indicating pathways underlying ectopic pregnancy.

Key Points

  • Investigate the molecular and physiological mechanisms underlying estrogenic endocrine-disrupting chemical-induced oviductal embryo retention using preimplantation 17β-estradiol exposure in pregnant mice.
  • Subcutaneously administered daily doses of 0, 0.1, 1, or 10 µg/kg 17β-estradiol to pregnant mice from day 0.5 to day 2.5 post-coitum.
  • Harvested oviducts, uteri, and embryos on day 3.5 post-coitum for assessment using embryo flushing, histology, microarray transcriptomic profiling, and real-time PCR validation.
  • Preimplantation 17β-estradiol caused dose-dependent oviductal embryo retention and developmental delay.
  • Transcriptomic profiling following 10 µg/kg/day treatment (fold change > 1.5, q-value < 5%) identified 57 differentially expressed genes (33 upregulated, 24 downregulated) in the oviduct versus 2,119 (1,115 upregulated, 1,004 downregulated) in the uterus.
  • Gene Ontology analysis revealed that 17β-estradiol upregulated immune responses across both tissues, but specifically downregulated oviductal ion transport, metabolism, nutrient transport, and muscle-related functions.

Cite This Study

Xiao et al. (2026) studied this question.

synapsesocial.com/papers/6a86b5978a91293e6a1cd090https://doi.org/10.1097/rd9.0000000000000181
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Also Consider

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  5. 5Proteomic analysis and in vivo visualization of extracellular vesicles from mouse oviducts during pre‐implantation embryo development2024 · 3 citations