Obstet Gynecol. Eur J Epidemiol. Betz D, Fane K. Human chorionic gonadotropin HCG. In: StatPearls [Internet]. Updated January 16, American College of Obstetricians and Gynecologists. Ectopic pregnancy. Updated February Early pregnancy loss. Updated August Gnoth C, Johnson S. Geburtshilfe Frauenheilkd. West J Emerg Med. Office on Women's Health.
Knowing if you are pregnant. Department of Health and Human Services. Updated January 30, Your Privacy Rights. To change or withdraw your consent choices for VerywellFamily. At any time, you can update your settings through the "EU Privacy" link at the bottom of any page. These choices will be signaled globally to our partners and will not affect browsing data. We and our partners process data to: Actively scan device characteristics for identification.
I Accept Show Purposes. Table of Contents View All. Table of Contents. The best way to determine if you are pregnant is to confirm the pregnancy with your health-care provider. However, if you have confirmed the pregnancy and have symptoms that suddenly disappear, it may mean that your pregnancy is not progressing normally. Pregnancy is dated from the first day of your last menstrual period, which is usually about two weeks before the date of conception.
The average baby takes days or 38 weeks to fully develop from conception to birth. Add two weeks to account for the time between your last menstrual period and the date of conception, and you come up with a grand total of 40 weeks. Most women give birth within two weeks before or after this date. Ultrasound is the best way to determine the estimated date of delivery. The earlier an ultrasound is done, the more accurate the dating.
Your estimated date of delivery is the one determined from your first ultrasound, and the date does not change if another ultrasound is done. Skip to main content. It looks like your browser does not have JavaScript enabled. Please turn on JavaScript and try again. And you need to see a doctor to have a blood test. The other checks the urine for the hCG hormone. Urine tests Doctors can perform urine pregnancy tests UPT in their office and is usually the first step in diagnosing a pregnancy.
After the urine testing, the doctor can perform even more pregnancy tests such as a blood test and sonogram. These tests can detect pregnancy earlier than a home pregnancy test, or about six to eight days after ovulation when an egg is released from the ovary.
But with these tests, it takes longer to get the results, usually days, than with a urine pregnancy test since they must be sent to a lab. A sonogram or ultrasound is a test done during pregnancy that uses reflected sound waves to produce a picture of a fetus. The picture is displayed on a TV screen and may be in black and white or in color. The pictures are also called a sonogram, echogram, or scan, and they may be saved as part of your medical record.
Sonogram sono can determine the gestational age or estimate age of the fetus. Therefore, it can give you approximately how far you are in your pregnancy; find out if you are pregnant with more than 1 fetus and the gestational age or estimate age of the fetus. Transvaginal in the vagina sonogram is generally done early in a pregnancy to determine fetal age or to detect a suspected ectopic pregnancy. For a vaginal sono you do not need a full bladder. The vaginal transducer, which resembles a thick wand, is usually covered with a latex sleeve or condom and a vaginal lubricant, such as K-Y Jelly.
If you are allergic to latex, tell the health professional before having the test. You will lie on your back with your hips slightly raised.
How you use them — Be sure to check the expiration date and follow the directions. Many involve holding a test stick in the urine stream.
For some, you collect urine in a cup and then dip the test stick into it. Then, depending on the brand, you will wait a few minutes to get the results. Research suggests waiting 10 minutes will give the most accurate result. Also, testing your urine first thing in the morning may boost the accuracy. You will be looking for a plus sign, a change in color, or a line. A change, whether bold or faint, means the result is positive. New digital tests show the words "pregnant" or "not pregnant".
Most tests also have a "control indicator" in the results window. This line or symbol shows whether or not the test is working. If the control indicator does not appear, the test is not working properly. You should not rely on any results from a HPT that may be faulty. Who uses them — The amount of hCG in the urine is different for every pregnant woman.
So, some women will have accurate results on the day of the missed period while others will need to wait longer. Also, some medicines affect HPTs. Discuss the medicines you use with your doctor before trying to become pregnant.
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