TY - GEN AU - James,W H TI - Birth ranks of spontaneous abortions in sibships of children affected by anencephaly or spina bifida SN - 0007-1447 PY - 1978///0321 KW - Abortion, Spontaneous KW - genetics KW - Anencephaly KW - Birth Order KW - Female KW - Humans KW - Pregnancy KW - Spina Bifida Occulta KW - Statistics as Topic N1 - Publication Type: Journal Article UR - https://doi.org/10.1136/bmj.1.6105.72 ER -