Head size (OFC) primary microcephaly (−3 SD at birth) microcephaly (NA at birth; −4.5 SD current) primary microcephaly (−2.5 SD at birth; −6.7 SD current) borderline microcephaly (NA at birth; −2 SD current) microcephaly (NA at birth; −3 SD current) microcephaly (−2...