Monteiro, J Commitment to X inactivation precedes the twinning event in monochorionic MZ twins. [electronic resource] - American journal of human genetics Aug 1998 - 339-46 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0002-9297 Standard No.: 10.1086/301978 doi Subjects--Topical Terms: AdolescentAdultChildChild, PreschoolChorionDNA--bloodFemaleFetal BloodHumansInfantMouth Mucosa--cytologyPregnancyRestriction MappingTwins, Dizygotic--geneticsTwins, Monozygotic--geneticsX Chromosome