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The babies born in the group of patients with pregnancy\u2010induced hypertension were significantly lighter and had a higher rate of fetal growth retardation than the babies born in a normotensive control group of patients matched for age and parity. Monozygotic twins, identified by HLA typing, occurred significantly more often in the group with pregnancy\u2010induced hypertension than in the control group. A possible immunological explanation for this finding is presented.<\/jats:p>","DOI":"10.1111\/j.1471-0528.1984.tb04760.x","type":"journal-article","created":{"date-parts":[[2005,8,23]],"date-time":"2005-08-23T08:15:12Z","timestamp":1124784912000},"page":"240-243","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Pregnancy\u2010induced hypertension in twin pregnancy"],"prefix":"10.1111","volume":"91","author":[{"given":"P. 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