Your Baby's Development
By week 10, all of your baby's vital organs have been formed and are starting to work together.
As external changes such as the separation of fingers and toes and the disappearance of the tail takes place, internal developments are taking place too. Tooth buds form inside the mouth, and if you're having a boy, his testes will begin producing the male hormone testosterone.
Congenital abnormalities are unlikely to develop after week 10. This also marks the end of the embryonic period — in general, the embryo now has a distinctly human appearance and starting next week your baby will officially be considered a fetus.
Your first prenatal visit, which often takes place around this time, is a milestone. At the doctor's office, you'll go through a series of tests and checks, including having your weight and blood pressure checked. You might also have an external abdominal examination to check the size and position of your baby and have your urine tested.
During this first prenatal visit, your health care provider will thoroughly examine you, including an internal examination and a breast exam. Your health care provider will also ask you many questions about your medical history and any family health problems, to determine if your baby is at risk for genetic diseases.
Another thing your provider will check? Your baby's heartbeat! Using a Doppler stethoscope, you should get to hear it for the first time.
As you leave your first appointment, your health care provider will probably send you for a blood test to find out whether you are immunized against varicella, measles, mumps, and rubella (German measles), as well as to determine your blood type and Rh factor. You may also be checked for the presence of certain infections, such as syphilis or hepatitis B, and you may be offered an HIV test.
Testing blood for certain genetic disorders is also commonly done — the type of tests offered will depend on your situation and preference.