A general ultrasound is a non-invasive imaging technique that uses sound waves to create images of internal organs, tissues, and blood flow. 

Yes, ultrasounds are safe and use no ionizing radiation. They are commonly used for diagnostic purposes in various medical fields.

Preparation varies; some may require fasting, while others might need a full bladder. Specific instructions will be provided based on the type of ultrasound. 

Results are typically reviewed by a radiologist and sent to your referring doctor within a few days. Your doctor will discuss the findings with you. 

During an ultrasound, a gel is applied to the abdomen, and a transducer is gently moved over the belly. This sends sound waves into the body, which bounce back and create images of the fetus on a monitor. It’s painless and usually takes about 20-30 minutes. 

Ultrasounds are generally considered safe and have been used for decades in pregnancy monitoring. The ultrasound technician uses low-frequency sound waves that are harmless to both you and your baby. However, it’s recommended to have ultrasounds only when medically necessary to minimize exposure. 

Ultrasounds can provide valuable information about your baby’s health and development. They can detect the baby’s heartbeat, confirm the number of fetuses, assess fetal growth, check the placenta and amniotic fluid levels, and screen for certain birth defects or abnormalities.