120/80 is the normal value during pregnancy. The following chart will clear the concept of high and low BP during pregnancy.
|Blood Pressure||Systolic Pressure||Diastolic Pressure|
|Low||110 mmHg||75 mmHg|
|Normal||120 mmHg||80 mmHg|
|High||130 mmHg||85 mmHg|
A value below 110/75 will be considered as low (hypo-tension), while a reading above 130-85 will be considered as high (hypertension). Normal readings can be different for different women. They may also vary slightly according to the overall health, age etc. For healthy women, the average range during pregnancy is between 110/70 and 120/80, but fluctuations in these levels are possible during pregnancy.