Hello Do the following if the child has microcephaly. And a few percent chance mental retardation. bpd:43mm ofd:53mm hc:150.8mm cm:4.7mm tcd:17mm ventriculum atrium:5.6mm tad:48mm apad:46mm ac:147.7mm fl:32mm humerus:32mm age of fetus:21week+5days estimated fetal weight hadlock(bpd-hc-ac-fl):313g 11oz also amniotic synthesis the QF-PCRmethod for chromosomes 21,13,18,x and y is normal

Summarized question: What causes microcephaly?