Simpson, JL, Gray, R, Perez, A
et al. (2002). Fertilisation involving ageing gametes, major birth defects, and Down's syndrome
.
LANCET, 359(9318), 1670-1671. 10.1016/S0140-6736(02)08559-8
Simpson, JL, Gray, R, Perez, A et al. (2002). Fertilisation involving ageing gametes, major birth defects, and Down's syndrome
. LANCET, 359(9318), 1670-1671. 10.1016/S0140-6736(02)08559-8