TY  - GEN
AU  - MACMAHON,B
AU  - PUGH,T F
TI  - Influence of birth order and maternal age on the human sex ratio at birth
SN  - 0007-1242
PY  - 2003///0501
KW  - Birth Order
KW  - Family
KW  - Female
KW  - Fetus
KW  - Humans
KW  - Maternal Age
KW  - Parturition
KW  - Pregnancy
KW  - Sex Ratio
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1136/jech.7.2.83
ER  -