1. Burton, G. J. & Jauniaux, E. Pathophysiology of placental-derived fetal growth restriction. Am. J. Obstet. Gynecol. 218, S745–S761. https://doi.org/10.1016/j.ajog.2017.11.577 (2018).
2. Phipps, E. A., Tadhani, R., Benzing, T. & Karumanchi, S. A. Pre-eclampsia: pathogenesis, novel diagnostics and therapies. Nat. Rev. Nephrol. 15, 275–289. https://doi.org/10.1038/s41581-019-0119-6 (2019).
3. Sadler, T. W. Langman’s Medical Embryology (Lippincott Williams & Wilkins, 2018).
4. Camp, J. G. et al. Multilineage communication regulates human liver bud development from pluripotency. Nature 546, 533–538. https://doi.org/10.1038/nature22796 (2017).
5. Takahashi, Y., Sekine, K., Kin, T., Takebe, T. & Taniguchi, H. Self-condensation culture enables vascularization of tissue fragments for efcient therapeutic transplantation. Cell Rep. 23, 1620–1629. https://doi.org/10.1016/j.celrep.2018.03.123 (2018).
6. Takebe, T. et al. Vascularized and functional human liver from an iPSC-derived organ bud transplant. Nature 499, 481–484. https:// doi.org/10.1038/nature12271 (2013).
7. Xu, R. H. et al. BMP4 initiates human embryonic stem cell diferentiation to trophoblast. Nat. Biotechnol. 20, 1261–1264. https:// doi.org/10.1038/nbt761 (2002).
8. Horii, M. et al. Human pluripotent stem cells as a model of trophoblast diferentiation in both normal development and disease. Proc. Natl. Acad. Sci. U.S.A. 113, E3882-3891. https://doi.org/10.1073/pnas.1604747113 (2016).
9. Roberts, R. M., Ezashi, T., Sheridan, M. A. & Yang, Y. Specifcation of trophoblast from embryonic stem cells exposed to BMP4. Biol. Reprod. 99, 212–224. https://doi.org/10.1093/biolre/ioy070 (2018).
10. Niakan, K. K. & Eggan, K. Analysis of human embryos from zygote to blastocyst reveals distinct gene expression patterns relative to the mouse. Dev. Biol. 375, 54–64. https://doi.org/10.1016/j.ydbio.2012.12.008 (2013).
11. Niwa, H., Miyazaki, J. & Smith, A. G. Quantitative expression of Oct-3/4 defnes diferentiation, dediferentiation or self-renewal of ES cells. Nat. Genet. 24, 372–376. https://doi.org/10.1038/74199 (2000).
12. Niwa, H. et al. Interaction between Oct3/4 and Cdx2 determines trophectoderm diferentiation. Cell 123, 917–929. https://doi. org/10.1016/j.cell.2005.08.040 (2005).
13. Strumpf, D. et al. Cdx2 is required for correct cell fate specifcation and diferentiation of trophectoderm in the mouse blastocyst. Development 132, 2093–2102. https://doi.org/10.1242/dev.01801 (2005).
14. Lee, Y. et al. A unifying concept of trophoblastic diferentiation and malignancy defned by biomarker expression. Hum. Pathol. 38, 1003–1013. https://doi.org/10.1016/j.humpath.2006.12.012 (2007).
15. Li, Y. et al. BMP4-directed trophoblast diferentiation of human embryonic stem cells is mediated through a DeltaNp63+ cytotrophoblast stem cell state. Development 140, 3965–3976. https://doi.org/10.1242/dev.092155 (2013).
16. Zhang, Y., Liang, X., Lian, Q. & Tse, H. F. Perspective and challenges of mesenchymal stem cells for cardiovascular regeneration. Expert Rev. Cardiovasc. Ter. 11, 505–517. https://doi.org/10.1586/erc.13.5 (2013).
17. Turco, M. Y. et al. Trophoblast organoids as a model for maternal-fetal interactions during human placentation. Nature 564, 263–267. https://doi.org/10.1038/s41586-018-0753-3 (2018).
18. Lian, Q. et al. Functional mesenchymal stem cells derived from human induced pluripotent stem cells attenuate limb ischemia in mice. Circulation 121, 1113–1123. https://doi.org/10.1161/CIRCULATIONAHA.109.898312 (2010).
19. Pittenger, M. F. et al. Mesenchymal stem cell perspective: cell biology to clinical progress. NPJ Regener. Med. 4, 22. https://doi.org/ 10.1038/s41536-019-0083-6 (2019).
20. Io, S. et al. New era of trophoblast research: integrating morphological and molecular approaches. Hum. Reprod. Update 26, 611–633. https://doi.org/10.1093/humupd/dmaa020 (2020).
21. Casey, M. L. & MacDonald, P. C. Interstitial collagen synthesis and processing in human amnion: a property of the mesenchymal cells. Biol. Reprod. 55, 1253–1260. https://doi.org/10.1095/biolreprod55.6.1253 (1996).
22. Olafsson, I. H., Vilhjalmsson, D. T. & Tormodsson, F. R. Preparation of cultured human vascular cells. Methods Mol. Biol. 849, 245–259. https://doi.org/10.1007/978-1-61779-551-0_17 (2012).
23. Takebe, T. et al. Generation of a vascularized and functional human liver from an iPSC-derived organ bud transplant. Nat. Protoc. 9, 396–409. https://doi.org/10.1038/nprot.2014.020 (2014).
24. Koyanagi, Y. et al. Primary human immunodefciency virus type 1 viremia and central nervous system invasion in a novel huPBL-immunodefcient mouse strain. J. Virol. 71, 2417–2424 (1997).
25. Ueda, T. et al. Expansion of human NOD/SCID-repopulating cells by stem cell factor, Flk2/Flt3 ligand, thrombopoietin, IL-6, and soluble IL-6 receptor. J. Clin. Investig. 105, 1013–1021. https://doi.org/10.1172/JCI8583 (2000).
26. Kondoh, E. et al. Stress afects uterine receptivity through an ovarian-independent pathway. Hum. Reprod. 24, 945–953. https:// doi.org/10.1093/humrep/den461 (2009).