Lower risk for Down syndrome associated with longer oral contraceptive use: a case–control study of women of advanced maternal age presenting for prenatal diagnosis
2013 ◽
Vol 87
(4)
◽
pp. 455-458
◽
Keyword(s):
1994 ◽
Vol 48
(3)
◽
pp. 324-325
◽
2008 ◽
Vol 169
(4)
◽
pp. 473-479
◽
1987 ◽
Vol 26
(1)
◽
pp. 85-90
◽
Keyword(s):
1974 ◽
Vol 3
(4)
◽
pp. 333-340
◽
2014 ◽
Vol 25
(9)
◽
pp. 1167-1177
◽
Keyword(s):
Keyword(s):