Add to ORKGThe twinning rate during a twenty-year period (1965-1985) was investigated at five-year intervals in four Brazilian hospitals. During this period the twinning rate has decreased significantly (from 10.68% to 8.11%), being highly negatively correlated with the five-year intervals (r = -0.97). This change was due mainly to the decline in dizygotic twinning, since the incidence of DZ twins has fallen from around 7% in 1965 to around 3.6% in 1985. The detected decline in DZ twinning seems to be due to the remotion of the fertility advantage of the more fecundable DZ twin-prone women by the introduction of effective birth control at the present, while some other mechanisms are causing the decline irrespective of the type of twinning.3857-6
BACKGROUND The natural dizygotic (DZ) twinning rate has been proposed as a reliable and useful measu...
Twin births are an important public health issue due to health complications for both mother and chi...
The twinning rate has increased dramatically over the last four decades in developed countries. Two ...
The twinning rate during a twenty-year period (1965-1985) was investigated at five-year intervals in...
A retrospective study was carried out on a sample consisting of 89,491 deliveries occurred from 1979...
3To whom correspondence should be addressed There is widespread concern about a possible decline in ...
BACKGROUND: In the wide-ranging debate about the potential monitors of population fertility, twinnin...
<div><p>Twin births are an important public health issue due to health complications for both mother...
The twinning rate has increased dramatically over the last four decades in developed countries. Two ...
The twinning rate has increased dramatically over the last four decades in developed countries. Two ...
Twin births are an important public health issue due to health complications for both mother and chi...
Twinning rates in developed countries have recently registered an increase. At the end of the 1970s,...
The twinning rate has increased dramatically over the last four decades in developed countries becau...
BACKGROUND. Decreased fecundity has been hypothesized as one of the causes of the widespread decline...
BACKGROUND: In the wide-ranging debate about the potential monitors of population fertility, twinnin...
BACKGROUND The natural dizygotic (DZ) twinning rate has been proposed as a reliable and useful measu...
Twin births are an important public health issue due to health complications for both mother and chi...
The twinning rate has increased dramatically over the last four decades in developed countries. Two ...
The twinning rate during a twenty-year period (1965-1985) was investigated at five-year intervals in...
A retrospective study was carried out on a sample consisting of 89,491 deliveries occurred from 1979...
3To whom correspondence should be addressed There is widespread concern about a possible decline in ...
BACKGROUND: In the wide-ranging debate about the potential monitors of population fertility, twinnin...
<div><p>Twin births are an important public health issue due to health complications for both mother...
The twinning rate has increased dramatically over the last four decades in developed countries. Two ...
The twinning rate has increased dramatically over the last four decades in developed countries. Two ...
Twin births are an important public health issue due to health complications for both mother and chi...
Twinning rates in developed countries have recently registered an increase. At the end of the 1970s,...
The twinning rate has increased dramatically over the last four decades in developed countries becau...
BACKGROUND. Decreased fecundity has been hypothesized as one of the causes of the widespread decline...
BACKGROUND: In the wide-ranging debate about the potential monitors of population fertility, twinnin...
BACKGROUND The natural dizygotic (DZ) twinning rate has been proposed as a reliable and useful measu...
Twin births are an important public health issue due to health complications for both mother and chi...
The twinning rate has increased dramatically over the last four decades in developed countries. Two ...