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.
How Early Can a Baby Be Seen on an Ultrasound?. Transvaginal and transabdominal ultrasounds allow women to see a developing baby or babies in their womb. During the first three weeks after conception, ultrasound technicians can't usually take any measurable images with an ultrasound. Around week four, you can see the gestational sac -- a cocoon-like structure that helps form the placenta. During the fifth week, you can see the tiny fetus, measuring approximately 1/8 to 1/16 of an inch. Earliest Images of Your Baby. Ultrasounds can detect the earliest images of your baby around five weeks after conception.