TY  - GEN
AU  - Spencer,D A
TI  - Down's syndrome; sex difference in relation to maternal age
SN  - 0140-6736
PY  - 1971///0803
KW  - Down Syndrome
KW  - Female
KW  - Humans
KW  - Male
KW  - Maternal Age
KW  - Pregnancy
KW  - Sex Factors
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1016/s0140-6736(71)91916-7
ER  -