wikiHow to Raise Low Blood Pressure. Low blood pressure â often defined as lower than 90 mm Hg systolic or 60 mm Hg diastolic â is a common medical condition with a variety of causes, including pregnancy, heart problems, some severe infections or allergies, blood loss, and even dehydration.
You may have an ultrasound between 18 to 20 weeks to evaluate dates, a multiples pregnancy, placenta location or complications. It may also be possible to determine the gender of your baby during this ultrasound.
Early ultrasound. If you've experienced problems, such as a previous miscarriage or bleeding in the first weeks of this pregnancy, your doctor or midwife may recommend an early ultrasound. This takes place when you're between six weeks and 10 weeks pregnant.