Multilingual Demographic Dictionary, second unified edition, English volume

Monozygotic twins (MONOZYGOTIC twins)

Translation
Section	English 606	Arabic 606	Czech 606	German 606	Spanish 606	French 606	Italian 606	Japanese 606	Portuguese 606	Russian 606	Chinese 606
606-1	single birth —single delivery	إيحاد—إفراد—إفذاذ	porod, jednočetný	Einzelgeburt	parto simple —alumbramiento simple	accouchement simple	parto semplice	単産	partos simples —único nascimento	Одноплодные роды —Простые роды	单胞胎
606-2	plural birth —multiple birth —multiple delivery	إتآم	porod, vícečetný	Zwillingsgeburt —Mehrlingsgeburt	parto múltiple —alumbramiento múltiple	accouchement gémellaire —accouchement multiple	parto plurimo —parto multiplo	複産	partos múltiplos —nascimentos múltiplos	Многоплодные роды —Многодетные роды	多胞胎
606-3	twin	توائم—تؤام	dvojčata	Zwillinge —Drillinge —Vierlinge —Fünflinge	gemelos —mellizos	jumeau	gemelli	双生児	gêmeos	Близнецы	双胞胎
606-4	monozygotic twins —uniovular twins —identical twins	وحيدة المحية—توائم أعيان	dvojčata, jednovaječná	eineiige Zwillinge	mellizos monozigóticos —univitelinos —idénticos —verdaderos mellizos	jumeau univitellin —jumeau identique —vrai jumeau	gemelli monozigoti —gemelli monovulari —gemelli monocoriali —gemelli omologhi	一卵性双生児	gêmeos monozigóticos —gêmeos uniovulares —gêmeos idênticos —gêmeos verdadeiros	Однояйцевые близнецы —Монозиготные близнецы	同卵双胞胎
606-5	dizygotic twins —biovular twins	توائم مزدوجة المحية—توائم مختلفة	dvojčata, dvouvaječná	zweieiige Zwillinge	mellizos dizigóticos —mellizos bivitelinos —mellizos fraternales —falsos mellizos	jumeau bivitellin —jumeau fraternel —faux jumeau	gemelli eterozigoti —gemelli biovulari —gemelli bicoriali —gemelli eterologhi	二卵性双生児	gêmeos dizigóticos —gêmeos biovulares —gêmeos falsos —gêmeos fraternos	Двуяйцовые близнецы —Дизиготные близнецы	异卵双胞胎

At most confinements there is a single birth ¹ or single delivery ¹ but at some there are plural births ², multiple births ² or multiple deliveries ². Two children born during the same confinement are called twins ³ and we may distinguish between monozygotic twins ⁴, uniovular twins ⁴ or identical twins ⁴ on the one hand, and dizygotic twins ⁵ or biovular twins ⁵ on the other. Monozygotic multiple births occur when one ovum splits after fertilization; the resulting children must always be of the same sex. Dizygotic multiple births are due to the simultaneous fertilization of two or more ova and the resulting children may be of different sexes.

2. In British official terminology the term maternity is used to denote a confinement resulting in the birth of one or more children; the number of births per maternity may be computed.
3. Where a multiple birth results in three children, these are-called triplets, four are quadruplets, and five quintuplets. The terms "twins", "triplets", etc. are generally used in accordance with the total number of deliveries during a confinement; occasionally, however, multiple births are classified only in accordance with the number of children born alive.

Audio pronunciation

single birth

single delivery

plural birth

multiple birth

multiple delivery