Spirometry is the most common lung function test. It measures how much and how quickly you can move air out of your lungs. You breathe into a mouthpiece attached to a machine called a spirometer. The machine records your results.
Confirming the presence of your babyâs heartbeat. You may have gone to your doctor with vaginal bleeding or you may be anxious because of problems in a previous pregnancy (such as miscarriage). This ultrasound can routinely detect a heartbeat in your baby as early as 6-7 weeks.
Transvaginal Ultrasound. Transvaginal ultrasound can be used to detect a fetus or gestational sac up to a week before traditional ultrasound. A transvaginal ultrasound is performed by inserting a lubricated wand into the vagina and performing the ultrasound internally.etecting a Gestational Sac on Ultrasound. The gestational sac is seen earlier than a fetus can be detected on an ultrasound. A gestational sac can be seen as early as the fifth week of pregnancy or three weeks after conception.