Quoting 2012 Marie:" August 10, 2012 my daughter was born weighing 5lbs 12ounces 18 inches long. due date was Aug 9th, I was ... [snip!] ... it, talked about it with the Dr. etc.. I still don't quite understand what causes this, if it will affect her future.."
Microcephaly, No, But it looks like it Is a Gene Mutation which May or May Not be Genetic, & Some other Possible Causation Links are Alcoholism (& there in by FASD), Diabetes(Maybe Gestational as well?), Chickenpox, Rubella(aka German Measles), CMV, or Radiation Exposure(as in At Ground Zero of a dropped Nuke).
Since it's Also By Definition an Undersized Skull I could see how it caused the Hydrocephalus. Oh it's also Linked to Higher incidence of Autism.
Hydrocephalus I DO Know about. My, Son's however was caused By a Stroke (the type known as an IVH/Intra-ventricular Hemorrhage, or "Brain Bleed") During L&D, an Issue that is Normal in Preemies &/or Low Birth-weight, Neither of which he was. He is actually Unusually smart, & Overall "Advanced", & That is NOT My estimation of his abilities, I always thought he was Behind, Until I had a more "Normal" kid. He Does get Migraines however, & they suspect it may be because of his VP Shunt (Ventriculoperitoneal aka "Artificial Brain Drain" aka "His Cyborg Parts"). As In By it's Very Presence, since it is Technically a Foreign Body.
As well, Our Little Cousin was Just Diagnosed with Hydrocephalus due to a previously unknown diagnosis of Spina Bifida, & Possibly Exacerbated by a case of Varicella(Chicken Pox). He was Just Diagnosed this June as he was Completing Grade 1. He currently does Not have a Shunt & May Not ever need one. It's a "Wait & See if He actually needs it" situation. At least I know the Signs of if His Hydro's acting up, Because they're the Same as Shunt Failure. Ohh umm yeah except for the Fact He does also Get Migraines too, which may or may not be related to the Hydro. & The signs of a Migraine are the same as Shunt Failure/Hydro-Pressure increase, & Then some.