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Multilingual Demographic Dictionary, second unified edition, English volume

Difference between revisions of "Monozygotic twins"

Multilingual Demographic Dictionary, second unified edition, English vol.
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(Eugen Grebenik et al., first edition 1958)
(Etienne van de Walle et al., second 1982 edition)
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<!--'''monozygotic twins'''-->
 
<!--'''monozygotic twins'''-->
{{TextTerms|S=606|P=60|Ed=I|CompleteIndexTerm=(MONOZYGOTIC twins)| content=
+
{{TextTerms|S=606|P=60|Ed=II|CompleteIndexTerm=(MONOZYGOTIC twins)| content=
 
{{NewLineT|S=606|N=1}} {{
 
{{NewLineT|S=606|N=1}} {{
TofT|Lang=en|Ed=I|N=1|Color=yes|Te=single birth}}{{
+
TofT|Lang=en|Ed=II|N=1|Color=yes|Te=single birth}}{{
TofT|Lang=en|Ed=I|N=1|SubN=2|Te=single delivery}}{{
+
TofT|Lang=en|Ed=II|N=1|SubN=2|Te=single delivery}}{{
TofT|Lang=ar|Ed=I|N=1|Te=ولادة فردية (فرد)}}{{
+
TofT|Lang=ar|Ed=II|N=1|Te=إيحاد}}{{
TofT|Lang=de|Ed=I|N=1|Color=yes|Te=einfache Geburt}}{{
+
TofT|Lang=ar|Ed=II|N=1|SubN=2|Te=إفراد}}{{
TofT|Lang=es|Ed=I|N=1|Te=alumbramiento sencillo}}{{
+
TofT|Lang=ar|Ed=II|N=1|SubN=3|Te=إفذاذ}}{{
TofT|Lang=fi|Ed=I|N=1|Color=yes|Te=yksisikiöinen synnytys}}{{
+
TofT|Lang=cs|Ed=II|N=1|Color=yes|Te=porod, jednočetný}}{{
TofT|Lang=fr|Ed=I|N=1|Te=accouchement simple}}{{
+
TofT|Lang=de|Ed=II|N=1|Te=Einzelgeburt}}{{
TofT|Lang=it|Ed=I|N=1|Color=yes|Te=parto semplice}}{{
+
TofT|Lang=es|Ed=II|N=1|Color=yes|Te=parto simple}}{{
TofT|Lang=pl|Ed=I|N=1|Te=poród pojedynczy}}{{
+
TofT|Lang=es|Ed=II|N=1|SubN=2|Te=alumbramiento simple}}{{
TofT|Lang=pt|Ed=I|N=1|Color=yes|Te=PARTO simples}}{{
+
TofT|Lang=fr|Ed=II|N=1|Te=accouchement simple}}{{
TofT|Lang=ru|Ed=I|N=1|Te=Одноплодные роды}}{{
+
TofT|Lang=it|Ed=II|N=1|Color=yes|Te=parto semplice}}{{
TofT|Lang=ru|Ed=I|N=1|SubN=2|Te=Простые роды}}
+
TofT|Lang=ja|Ed=II|N=1|Te=単産}}{{
 +
TofT|Lang=pt|Ed=II|N=1|Color=yes|Te=partos simples}}{{
 +
TofT|Lang=pt|Ed=II|N=1|SubN=2|Te=único nascimento}}{{
 +
TofT|Lang=ru|Ed=II|N=1|Te=Одноплодные роды}}{{
 +
TofT|Lang=ru|Ed=II|N=1|SubN=2|Te=Простые роды}}{{
 +
TofT|Lang=zh|Ed=II|N=1|Color=yes|Te=单胞胎}}
 
{{NewLineT|S=606|N=2}} {{
 
{{NewLineT|S=606|N=2}} {{
TofT|Lang=en|Ed=I|N=2|Color=yes|Te=plural birth}}{{
+
TofT|Lang=en|Ed=II|N=2|Color=yes|Te=plural birth}}{{
TofT|Lang=en|Ed=I|N=2|SubN=2|Te=multiple birth}}{{
+
TofT|Lang=en|Ed=II|N=2|SubN=2|Te=multiple birth}}{{
TofT|Lang=en|Ed=I|N=2|SubN=3|Te=multiple delivery}}{{
+
TofT|Lang=en|Ed=II|N=2|SubN=3|Te=multiple delivery}}{{
TofT|Lang=ar|Ed=I|N=2|Te=ولادة توأمية (توأم)}}{{
+
TofT|Lang=ar|Ed=II|N=2|Te=إتآم}}{{
TofT|Lang=ar|Ed=I|N=2|SubN=2|Te=ولادة متعددة (متعدد)}}{{
+
TofT|Lang=cs|Ed=II|N=2|Color=yes|Te=porod, vícečetný}}{{
TofT|Lang=de|Ed=I|N=2|Color=yes|Te=Zwillingsgeburt}}{{
+
TofT|Lang=de|Ed=II|N=2|Te=Zwillingsgeburt}}{{
TofT|Lang=de|Ed=I|N=2|SubN=2|Te=Mehrlingsgeburt}}{{
+
TofT|Lang=de|Ed=II|N=2|SubN=2|Te=Mehrlingsgeburt}}{{
TofT|Lang=es|Ed=I|N=2|Te=alumbramiento múltiple}}{{
+
TofT|Lang=es|Ed=II|N=2|Color=yes|Te=parto múltiple}}{{
TofT|Lang=fi|Ed=I|N=2|Color=yes|Te=monisikiöinen synnytys}}{{
+
TofT|Lang=es|Ed=II|N=2|SubN=2|Te=alumbramiento múltiple}}{{
TofT|Lang=fr|Ed=I|N=2|Te=accouchement gémellaire}}{{
+
TofT|Lang=fr|Ed=II|N=2|Te=accouchement gémellaire}}{{
TofT|Lang=fr|Ed=I|N=2|SubN=2|Te=accouchement multiple}}{{
+
TofT|Lang=fr|Ed=II|N=2|SubN=2|Te=accouchement multiple}}{{
TofT|Lang=it|Ed=I|N=2|Color=yes|Te=parto plurimo}}{{
+
TofT|Lang=it|Ed=II|N=2|Color=yes|Te=parto plurimo}}{{
TofT|Lang=it|Ed=I|N=2|SubN=2|Te=parto multiplo}}{{
+
TofT|Lang=it|Ed=II|N=2|SubN=2|Te=parto multiplo}}{{
TofT|Lang=pl|Ed=I|N=2|Te=poród wieloraki}}{{
+
TofT|Lang=ja|Ed=II|N=2|Te=複産}}{{
TofT|Lang=pt|Ed=I|N=2|Color=yes|Te=PARTO gemelar}}{{
+
TofT|Lang=pt|Ed=II|N=2|Color=yes|Te=partos múltiplos}}{{
TofT|Lang=pt|Ed=I|N=2|SubN=2|Te=PARTO múltiplo}}{{
+
TofT|Lang=pt|Ed=II|N=2|SubN=2|Te=nascimentos múltiplos}}{{
TofT|Lang=ru|Ed=I|N=2|Te=Многоплодные роды}}{{
+
TofT|Lang=ru|Ed=II|N=2|Te=Многоплодные роды}}{{
TofT|Lang=ru|Ed=I|N=2|SubN=2|Te=Многодетные роды}}
+
TofT|Lang=ru|Ed=II|N=2|SubN=2|Te=Многодетные роды}}{{
 +
TofT|Lang=zh|Ed=II|N=2|Color=yes|Te=多胞胎}}
 
{{NewLineT|S=606|N=3}} {{
 
{{NewLineT|S=606|N=3}} {{
TofT|Lang=en|Ed=I|N=3|Color=yes|Te=twin}}{{
+
TofT|Lang=en|Ed=II|N=3|Color=yes|Te=twin}}{{
TofT|Lang=ar|Ed=I|N=3|Te=توائم (توأم)}}{{
+
TofT|Lang=ar|Ed=II|N=3|Te=توائم}}{{
TofT|Lang=de|Ed=I|N=3|Color=yes|Te=Zwillinge}}{{
+
TofT|Lang=ar|Ed=II|N=3|SubN=2|Te=تؤام}}{{
TofT|Lang=de|Ed=I|N=3|SubN=2|Te=Drillinge}}{{
+
TofT|Lang=cs|Ed=II|N=3|Color=yes|Te=dvojčata}}{{
TofT|Lang=de|Ed=I|N=3|SubN=3|Te=Vierlinge}}{{
+
TofT|Lang=de|Ed=II|N=3|Te=Zwillinge}}{{
TofT|Lang=de|Ed=I|N=3|SubN=4|Te=Fünflinge}}{{
+
TofT|Lang=de|Ed=II|N=3|SubN=2|Te=Drillinge}}{{
TofT|Lang=es|Ed=I|N=3|Te=gemelo}}{{
+
TofT|Lang=de|Ed=II|N=3|SubN=3|Te=Vierlinge}}{{
TofT|Lang=fi|Ed=I|N=3|Color=yes|Te=kaksoset}}{{
+
TofT|Lang=de|Ed=II|N=3|SubN=4|Te=Fünflinge}}{{
TofT|Lang=fi|Ed=I|N=3|SubN=2|Te=kolmoset}}{{
+
TofT|Lang=es|Ed=II|N=3|Color=yes|Te=gemelos}}{{
TofT|Lang=fi|Ed=I|N=3|SubN=2|Te=lähdettäminen sikiön}}{{
+
TofT|Lang=es|Ed=II|N=3|SubN=2|Te=mellizos}}{{
TofT|Lang=fi|Ed=I|N=3|SubN=3|Te=neloset}}{{
+
TofT|Lang=fr|Ed=II|N=3|Te=jumeau}}{{
TofT|Lang=fr|Ed=I|N=3|Te=jumeau}}{{
+
TofT|Lang=it|Ed=II|N=3|Color=yes|Te=gemelli}}{{
TofT|Lang=it|Ed=I|N=3|Color=yes|Te=gemello}}{{
+
TofT|Lang=ja|Ed=II|N=3|Te=双生児}}{{
TofT|Lang=pl|Ed=I|N=3|Te=bliźniaki}}{{
+
TofT|Lang=pt|Ed=II|N=3|Color=yes|Te= gêmeos}}{{
TofT|Lang=pt|Ed=I|N=3|Color=yes|Te=GÊMEOS}}{{
+
TofT|Lang=ru|Ed=II|N=3|Te=Близнецы}}{{
TofT|Lang=ru|Ed=I|N=3|Te=Близнецы}}
+
TofT|Lang=zh|Ed=II|N=3|Color=yes|Te=双胞胎}}
 
{{NewLineT|S=606|N=4}} {{
 
{{NewLineT|S=606|N=4}} {{
TofT|Lang=en|Ed=I|N=4|Color=yes|Te=monozygotic twins}}{{
+
TofT|Lang=en|Ed=II|N=4|Color=yes|Te=monozygotic twins}}{{
TofT|Lang=en|Ed=I|N=4|SubN=2|Te=uniovular twins}}{{
+
TofT|Lang=en|Ed=II|N=4|SubN=2|Te=uniovular twins}}{{
TofT|Lang=en|Ed=I|N=4|SubN=3|Te=identical twins}}{{
+
TofT|Lang=en|Ed=II|N=4|SubN=3|Te=identical twins}}{{
TofT|Lang=ar|Ed=I|N=4|Te=توائم وحيدة المحية (توأم)}}{{
+
TofT|Lang=ar|Ed=II|N=4|Te=وحيدة المحية}}{{
TofT|Lang=ar|Ed=I|N=4|SubN=2|Te=أعيان (أعيان)}}{{
+
TofT|Lang=ar|Ed=II|N=4|SubN=2|Te=توائم أعيان}}{{
TofT|Lang=de|Ed=I|N=4|Color=yes|Te=Eineiige Zwillinge}}{{
+
TofT|Lang=cs|Ed=II|N=4|Color=yes|Te=dvojčata, jednovaječná}}{{
TofT|Lang=es|Ed=I|N=4|Te=gemelos univitelinos}}{{
+
TofT|Lang=de|Ed=II|N=4|Te=eineiige Zwillinge}}{{
TofT|Lang=es|Ed=I|N=4|SubN=2|Te=verdaderos gemelos}}{{
+
TofT|Lang=es|Ed=II|N=4|Color=yes|Te=mellizos monozigóticos}}{{
TofT|Lang=fi|Ed=I|N=4|Color=yes|Te=identtiset kaksoset}}{{
+
TofT|Lang=es|Ed=II|N=4|SubN=2|Te=univitelinos}}{{
TofT|Lang=fi|Ed=I|N=4|SubN=2|Te=samamunaiset kaksoset}}{{
+
TofT|Lang=es|Ed=II|N=4|SubN=3|Te=idénticos}}{{
TofT|Lang=fr|Ed=I|N=4|Te=jumeau univitellin}}{{
+
TofT|Lang=es|Ed=II|N=4|SubN=4|Te=verdaderos mellizos}}{{
TofT|Lang=fr|Ed=I|N=4|SubN=2|Te=jumeau identique}}{{
+
TofT|Lang=fr|Ed=II|N=4|Te=jumeau univitellin}}{{
TofT|Lang=fr|Ed=I|N=4|SubN=3|Te=vrai jumeau}}{{
+
TofT|Lang=fr|Ed=II|N=4|SubN=2|Te=jumeau identique}}{{
TofT|Lang=it|Ed=I|N=4|Color=yes|Te=gemello monovulare}}{{
+
TofT|Lang=fr|Ed=II|N=4|SubN=3|Te=vrai jumeau}}{{
TofT|Lang=it|Ed=I|N=4|SubN=2|Te=gemello monocoriale}}{{
+
TofT|Lang=it|Ed=II|N=4|Color=yes|Te=gemelli monozigoti}}{{
TofT|Lang=it|Ed=I|N=4|SubN=3|Te=gemello omologo}}{{
+
TofT|Lang=it|Ed=II|N=4|SubN=2|Te=gemelli monovulari}}{{
TofT|Lang=pl|Ed=I|N=4|Te=bliźniaki jednojajowe}}{{
+
TofT|Lang=it|Ed=II|N=4|SubN=3|Te=gemelli monocoriali}}{{
TofT|Lang=pl|Ed=I|N=4|SubN=2|Te=bliźniaki identyczne}}{{
+
TofT|Lang=it|Ed=II|N=4|SubN=4|Te=gemelli omologhi}}{{
TofT|Lang=pt|Ed=I|N=4|Color=yes|Te=GÊMEOS monozigóticos}}{{
+
TofT|Lang=ja|Ed=II|N=4|Te=一卵性双生児}}{{
TofT|Lang=pt|Ed=I|N=4|SubN=2|Te=GÊMEOS uniovulares}}{{
+
TofT|Lang=pt|Ed=II|N=4|Color=yes|Te=gêmeos monozigóticos}}{{
TofT|Lang=pt|Ed=I|N=4|SubN=3|Te=GÊMEOS idênticos}}{{
+
TofT|Lang=pt|Ed=II|N=4|SubN=2|Te=gêmeos uniovulares }}{{
TofT|Lang=pt|Ed=I|N=4|SubN=4|Te=GÊMEOS verdadeiros}}{{
+
TofT|Lang=pt|Ed=II|N=4|SubN=3|Te= gêmeos idênticos}}{{
TofT|Lang=ru|Ed=I|N=4|Te=Однояйцовые близнецы}}
+
TofT|Lang=pt|Ed=II|N=4|SubN=4|Te= gêmeos verdadeiros }}{{
 +
TofT|Lang=ru|Ed=II|N=4|Te=Однояйцевые близнецы}}{{
 +
TofT|Lang=ru|Ed=II|N=4|SubN=2|Te=Монозиготные близнецы}}{{
 +
TofT|Lang=zh|Ed=II|N=4|Color=yes|Te=同卵双胞胎}}
 
{{NewLineT|S=606|N=5}} {{
 
{{NewLineT|S=606|N=5}} {{
TofT|Lang=en|Ed=I|N=5|Color=yes|Te=dizygotic twins}}{{
+
TofT|Lang=en|Ed=II|N=5|Color=yes|Te=dizygotic twins}}{{
TofT|Lang=en|Ed=I|N=5|SubN=2|Te=biovular twins}}{{
+
TofT|Lang=en|Ed=II|N=5|SubN=2|Te=biovular twins}}{{
TofT|Lang=en|Ed=I|N=5|SubN=3|Te=fraternal twins}}{{
+
TofT|Lang=ar|Ed=II|N=5|Te=توائم مزدوجة المحية}}{{
TofT|Lang=en|Ed=I|N=5|SubN=4|Te=non-identical twins}}{{
+
TofT|Lang=ar|Ed=II|N=5|SubN=2|Te=توائم مختلفة}}{{
TofT|Lang=ar|Ed=I|N=5|Te=توائم مزدوجة المحية (توأم)}}{{
+
TofT|Lang=cs|Ed=II|N=5|Color=yes|Te=dvojčata, dvouvaječná}}{{
TofT|Lang=ar|Ed=I|N=5|SubN=2|Te=توائم مختلفة المحية (خلف)}}{{
+
TofT|Lang=de|Ed=II|N=5|Te=zweieiige Zwillinge}}{{
TofT|Lang=de|Ed=I|N=5|Color=yes|Te=Zweieiige Zwillinge}}{{
+
TofT|Lang=es|Ed=II|N=5|Color=yes|Te=mellizos dizigóticos}}{{
TofT|Lang=es|Ed=I|N=5|Te=gemelos bivitelinos}}{{
+
TofT|Lang=es|Ed=II|N=5|SubN=2|Te=mellizos bivitelinos}}{{
TofT|Lang=es|Ed=I|N=5|SubN=2|Te=falsos gemelos}}{{
+
TofT|Lang=es|Ed=II|N=5|SubN=3|Te=mellizos fraternales}}{{
TofT|Lang=fi|Ed=I|N=5|Color=yes|Te=erimunaiset kaksoset}}{{
+
TofT|Lang=es|Ed=II|N=5|SubN=4|Te=falsos mellizos}}{{
TofT|Lang=fr|Ed=I|N=5|Te=jumeau bivitellin}}{{
+
TofT|Lang=fr|Ed=II|N=5|Te=jumeau bivitellin}}{{
TofT|Lang=fr|Ed=I|N=5|SubN=2|Te=jumeau fraternel}}{{
+
TofT|Lang=fr|Ed=II|N=5|SubN=2|Te=jumeau fraternel}}{{
TofT|Lang=fr|Ed=I|N=5|SubN=3|Te=faux jumeau}}{{
+
TofT|Lang=fr|Ed=II|N=5|SubN=3|Te=faux jumeau}}{{
TofT|Lang=it|Ed=I|N=5|Color=yes|Te=gemello biovulare}}{{
+
TofT|Lang=it|Ed=II|N=5|Color=yes|Te=gemelli eterozigoti}}{{
TofT|Lang=it|Ed=I|N=5|SubN=2|Te=gemello bicoriale}}{{
+
TofT|Lang=it|Ed=II|N=5|SubN=2|Te=gemelli biovulari}}{{
TofT|Lang=it|Ed=I|N=5|SubN=3|Te=gemello eterologo}}{{
+
TofT|Lang=it|Ed=II|N=5|SubN=3|Te=gemelli bicoriali}}{{
TofT|Lang=pl|Ed=I|N=5|Te=bliźniaki dwujajowe}}{{
+
TofT|Lang=it|Ed=II|N=5|SubN=4|Te=gemelli eterologhi}}{{
TofT|Lang=pl|Ed=I|N=5|SubN=2|Te=bliźniaki nieidentyczne}}{{
+
TofT|Lang=ja|Ed=II|N=5|Te=二卵性双生児}}{{
TofT|Lang=pt|Ed=I|N=5|Color=yes|Te=GÊMEOS dizigóticos}}{{
+
TofT|Lang=pt|Ed=II|N=5|Color=yes|Te=gêmeos dizigóticos }}{{
TofT|Lang=pt|Ed=I|N=5|SubN=2|Te=GÊMEOS biovulares}}{{
+
TofT|Lang=pt|Ed=II|N=5|SubN=2|Te=gêmeos biovulares}}{{
TofT|Lang=pt|Ed=I|N=5|SubN=3|Te=GÊMEOS falsos}}{{
+
TofT|Lang=pt|Ed=II|N=5|SubN=3|Te= gêmeos falsos }}{{
TofT|Lang=pt|Ed=I|N=5|SubN=4|Te=GÊMEOS fraternos}}{{
+
TofT|Lang=pt|Ed=II|N=5|SubN=4|Te= gêmeos fraternos }}{{
TofT|Lang=ru|Ed=I|N=5|Te=Двуяйцовые близнецы}}|
+
TofT|Lang=ru|Ed=II|N=5|Te=Двуяйцовые близнецы}}{{
Lang=en|Lang2=ar|Lang3=de|Lang4=es|Lang5=fi|Lang6=fr|Lang7=it|Lang8=pl|Lang9=pt|Lang10=ru}}
+
TofT|Lang=ru|Ed=II|N=5|SubN=2|Te=Дизиготные близнецы}}{{
 +
TofT|Lang=zh|Ed=II|N=5|Color=yes|Te=异卵双胞胎}}|
 +
Lang=en|Lang2=ar|Lang3=cs|Lang4=de|Lang5=es|Lang6=fr|Lang7=it|Lang8=ja|Lang9=pt|Lang10=ru|Lang11=zh}}
  
 
{{Gallery
 
{{Gallery
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| height=20
 
| height=20
 
| lines=3
 
| lines=3
|606_1_1_en_I Single birth.ogg|'''single birth'''  
+
|606_1_1_en_II Single birth.ogg|'''single birth'''  
|606_1_2_en_I Single delivery.ogg|'''single delivery'''  
+
|606_1_2_en_II Single delivery.ogg|'''single delivery'''  
|606_2_1_en_I Plural birth.ogg|'''plural birth'''  
+
|606_2_1_en_II Plural birth.ogg|'''plural birth'''  
|606_2_2_en_I Multiple birth.ogg|'''multiple birth'''  
+
|606_2_2_en_II Multiple birth.ogg|'''multiple birth'''  
|606_2_3_en_I Multiple delivery.ogg|'''multiple delivery'''  
+
|606_2_3_en_II Multiple delivery.ogg|'''multiple delivery'''  
|606_3_1_en_I Twin.ogg|'''twin'''  
+
|606_3_1_en_II Twin.ogg|'''twin'''  
|606_4_1_en_I Monozygotic twins.ogg|'''monozygotic twins'''  
+
|606_4_1_en_II Monozygotic twins.ogg|'''monozygotic twins'''  
|606_4_2_en_I Uniovular twins.ogg|'''uniovular twins'''  
+
|606_4_2_en_II Uniovular twins.ogg|'''uniovular twins'''  
|606_4_3_en_I Identical twins.ogg|'''identical twins'''  
+
|606_4_3_en_II Identical twins.ogg|'''identical twins'''  
|606_5_1_en_I Dizygotic twins.ogg|'''dizygotic twins'''  
+
|606_5_1_en_II Dizygotic twins.ogg|'''dizygotic twins'''  
|606_5_2_en_I Biovular twins.ogg|'''biovular twins'''
+
|606_5_2_en_II Biovular twins.ogg|'''biovular twins'''  
|606_5_3_en_I Fraternal twins.ogg|'''fraternal twins'''
 
|606_5_4_en_I Non-identical twins.ogg|'''non-identical twins'''  
 
 
}}
 
}}
  
 
<noinclude>
 
<noinclude>
[[en-I:monozygotic twins]] [[ar-I:توائم وحيدة المحية (توأم)]] [[de-I:Eineiige Zwillinge]] [[es-I:gemelos univitelinos]] [[fi-I:identtiset kaksoset]] [[fr-I:jumeau univitellin]] [[it-I:gemello monovulare]] [[pl-I:bliźniaki jednojajowe]] [[pt-I:GÊMEOS monozigóticos]] [[ru-I:Однояйцовые близнецы]]  
+
[[en-II:monozygotic twins]] [[ar-II:وحيدة المحية]] [[cs-II:dvojčata, jednovaječná]] [[de-II:eineiige Zwillinge]] [[es-II:mellizos monozigóticos]] [[fr-II:jumeau univitellin]] [[it-II:gemelli monozigoti]] [[ja-II:一卵性双生児]] [[pt-II:gêmeos monozigóticos]] [[ru-II:Однояйцевые близнецы]] [[zh-II:同卵双胞胎]]  
 
</noinclude>
 
</noinclude>
 
<noinclude>
 
<noinclude>
[[Category:Term of the first edition of the multilingual demographic Dictionary]]
+
[[Category:Term of the second edition of the multilingual demographic Dictionary]]
 
[[Category:Fertility]]
 
[[Category:Fertility]]
 
[[Category:60]]
 
[[Category:60]]
 
</noinclude>
 
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Revision as of 10:32, 9 January 2010

Monozygotic twins  (MONOZYGOTIC twins)


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.

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