A pregnant woman asks about prenatal diagnosis of hydrocephalus. The nurse's response should be based on which knowledge?
a. It can be diagnosed only after birth.
b. It can be diagnosed by chromosome studies.
c. It can be diagnosed with fetal ultrasonography.
d. It can be diagnosed by measuring the lecithin-to-sphingomyelin ratio.
ANS: C
Hydrocephalus can be diagnosed by fetal ultrasonography as early as 14 weeks of gestation. Most incidents of hydrocephalus are not chromosomal in origin. The lecithin-to-sphingomyelin ratio can be used to determine fetal lung maturity.
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