Final answer:
The question's specific percentage for prenatal screening for gestational hypertension is not given. However, gestational hypertension is a critical concern in prenatal care, which affects both the mother's and the fetus's health, particularly regarding conditions like IUGR and trisomy 21, which are influenced by maternal age.
Step-by-step explanation:
The prenatal screening percentage for gestational hypertension is not specifically provided in the reference materials. But, it is essential to note that regular prenatal check-ups are critical for monitoring potential conditions such as gestational hypertension. Gestational hypertension can lead to complications like intrauterine growth restriction (IUGR) and low birthweight. Conditions like IUGR are often due to placental factors and can significantly affect fetal development.
Gestational hypertension and related conditions are critical concerns during pregnancy, and hence, monitoring blood pressure levels and other health indicators is standard during prenatal care. Mothers may also face increased risks as they age, as the incidence of having a fetus with trisomy 21 increases dramatically with the age of the birth parent.