Is the natural twinning rate now stable?
Murphy
M F
MF
ICRF General Practice Research Group, Institute of Health Sciences, Headington, Oxford.
Hey
K
K
Whiteman
D
D
O'Donnell
M
M
Willis
B
B
Barlow
D
D
D017677:Age Distribution; D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D017533:Marital Status / Q000706:statistics & numerical data; D008423:Maternal Age; D010062:Ovulation Induction / Q000706:statistics & numerical data* / Q000639:trends; D011159:Population Surveillance; D011247:Pregnancy; D011272:Pregnancy, Multiple / Q000706:statistics & numerical data*; D012099:Reproductive Techniques / Q000706:statistics & numerical data* / Q000639:trends; D014852:Wales / Q000453:epidemiology