Welcome to HCM,
Its good to know that no anomaly was identified in your baby.
The presence of a mildly elevated RI and diastolic notching in one of the uterine arteries, implies that you are at a moderately higher risk of having a small baby which may require early delivery.
It is just a screening method, to identify which pregnancy there is a chance of having babies which can have problems attaining their full growth and these pregnancy require additional monitoring for blood pressure and weight gain of baby by serial ultrasound
every 2 weekly till delivery.
Though your current readings are normal there is a chance you could develop high blood pressure
in the later months. But do not worry, since its identified that you are at a slightly higher risk we can monitor your pregnancy more closely to ensure a good outcome. There is a chance of early delivery though.
Calcium is known to help in decreasing the risk of pregnancy induced hypertension
. The iron is to decrease the risk of anemia
prevents the development of hypertension in later months and can be safely given till delivery it does not cause any side effects.
Have an adequate diet and go for regular checks for blood pressure, urine protein and ultrasound and Doppler studies to your Obstetrician.
Hope this helps.