If you have missed your period and suspect that you may be pregnant, you can see a gynaecologist who can then do a urine pregnancy test for you in his clinic. In addition, he can also perform a pelvic ultrasound scan to detect the presence of an intrauterine pregnancy (or two!).
If the gestational sac (pregnancy sac) cannot be seen on ultrasound scan and you have been confirmed to be pregnant, a beta HCG (pregnancy hormone) blood test can be then taken to determine how far you are along in your pregnancy.
If you are too early for the gestation sac to be seen on ultrasound scan, you will be given a later date to return for a repeat ultrasound scan.
If beta HCG shows that you are well advanced in your pregnancy and a gestation sac cannot be seen in the womb then there is a possibility of an ectopic pregnancy (pregnancy in the tube).