There are many different tests that can be done during pregnancy, starting from home pregnancy tests to let you know if you are pregnant, or not to tests done in the 3rd trimester to check the health of the fetus.

Home pregnancy tests detect the presence of the pregnancy hormone called human chorionic gonadotropin (hCG) in your urine. 

Other pregnancy or prenatal tests are done for many diferent purposes, especially when there are concerns for mother's or fetus' health.

Multiple Marker - Triple or Quadruple Screen

The multiple marker test (sometimes referred to as the triple screen) can tell you if your baby is at an increased risk of having certain birth defects and genetic abnormalities. ... read more »

Fetal Testing and Monitoring

Fetal testing and monitoring are done to ensure that a fetus is healthy and growing at an acceptable rate. Fetal tests can help detect potential and actual problems. This gives the doctors an opportunity to treat the problem before it further develops, if at all possible. ... read more »

Determination of the Gestational Age During Pregnancy

Doctors use various methods to determine gestational age of a pregnancy.The most common test is the ultrasound, which measures the size of the gestational sac and the length between crown and rump. ... read more »

When Is the Blood hCG Pregnancy Test Positive?

A blood pregnancy test usually becomes positive within 3-4 days after implantation, or several days before your expected menstrual period, when  hCG levels have reached a high enough level. ... read more »

Search the Literature

Find published articles ... read more »

Crown Rump Length Chart: Fetal Ultrasound Measurements

The fetal crown rump length (CRL) is the measurement between the top of the head to the area above where the legs begin. ... read more »

hCG not doubling

My hCG is not doubling, what's wrong ... read more »

Twins When HCG Increasing Too Fast

In most pregnancies, the normal hCG rises is at least 60% over 48 hours. In twins it may rise much more, but  it's not possible to diagnose a twin pregnancy just from the hCG levels alone. ... read more »

How Soon Can I Take a Pregnancy Test?

Most current pregnancy test kits (sensitivity 25 mIU/ml) detect hCG in the urine as early as 3-4 days after implantation, though it often takes longer. ... read more »

Low and High hCG Levels

What do they mean? ... read more »

I Have Early Pregnancy Symptoms, Could I Be Pregnant?

If you think you may be pregnant and or you're experiencing some possible symptoms read here more about pregnancy diagnosis! ... read more »

hCG Levels and Pregnancy Testing

This article is about normal hCG pregnancy hormone levels implantation symptoms and bleeding and early pregnancy tests ... read more »

hCG Increasing Fast

There is no sufficient scientific evidence that with twins there is always a faster-than-usual rise in hCG. Normal hCG values can vary up to 20 times in normal pregnancies. ... read more »

hCG in Early Pregnancy

What is a normal hCG level? ... read more »

What Is a Glucose Challenge Test?

Before and during pregnancy there is usually a two-step approach to diagnosing diabetes: Glucose Challenge Test (GCT) and Glucose Tolerance Test (GTT). ... read more »

Early hCG Levels

When is the HPT positive? ... read more »

What Affects Normal hCG Levels In Pregnancy?

Human chorionic gonadotropin, more frequently referred to as hCG, is a hormone that is produced during pregnancy. ... read more »

Progesterone and Pregnancy Tests

Can progesterone supplements influence the test? ... read more »

Home Pregnancy Tests

Consumer Reports tested 18 pregnancy tests to find out which brands work best. Buy the top performers and follow their tips for the most accurate results. ... read more »

Pregnancy Tests

Which pregnancy tests are best? ... read more »

Normal hCG Levels

When a blood pregnancy test is run, the hCG level will be reported to the obstetrician. This level will give the doctor a look into the age and the health of the pregnancy. ... read more »

Negative Blood hCG Pregnancy Test

Could I still be pregnant even though my blood hCG test was negative? ... read more »

Low and Slow Rising hCG Blood Levels in Pregnancy Test

When is the hCG titer in the blood considered to be too low and when is it considered to be slow rising? ... read more »

Feeling Pregnant With Negative Home Pregnancy Test (HPT)

I am feeling pregnant but got a negative home pregnancy test result, what should I do next? ... read more »

Early Home Pregnancy Test HPT

Several brands of home pregnancy tests claim to test for pregnancy before the missed period. These tests are more sensitive to hCG. ... read more »

False Positive False Negative Pregnancy Test

A false positive early pregnancy tests is a pregnancy test that is positive when in fact you are not pregnant. ... read more »

What Is A Phantom hCG And What Causes the False Positive Pregnancy Test

A "Phantom hCG" is a false positive blood pregnancy test. Patients with phantom hCG will have a persistently and not significantly rising positive blood pregnancy test despite a negative urine test. ... read more »

Positive Pregnancy Test Results

Positive pregnancy test results can show up any time before or after a missed period. Read below more about when the pregnancy test result first becomes positive. ... read more »

Normal hCG Levels in Pregnancy

Human chorionic gonadotropin hCG levels can vary significantly in pregnancy, and  there is a wide range of normal levels in early pregnancy. ... read more »

hCG Information Levels and Numbers in Early Pregnancy

hCG pregnancy hormone information on hCG numbers in early pregnancy and all the facts are presented here. ... read more »

hCG Levels in Early Pregnancy

The pregnancy hormone hCG levels double early on in 1-2 days. HCG is being produced by the placenta as soon as implantation occurs, about one week after fertilization and ovulation. ... read more »

Human Chorionic Gonadotropin, the Pregnancy Hormone

Find out more about the pregnancy hormone hCG, how it's used to determine pregnancy, and how the concentration changes during pregnancy. ... read more »

hCG Human Chorionic Gonadotropin During Pregnancy

You will find here hCG levels and all the hCG information and facts about the pregnancy hormone which increases by at least 60% every 2 days until it reaches 1,200 mIU/ml. ... read more »

Amniotic Fluid Evaluation

The AFI and the single pocket evaluation are 2 ways to evaluate the amniotic fluid. ... read more »

Do You Need a Second or Third Trimester Anatomic Ultrasound?

The following is a listing of indications for the anatomic ultrasound. An ultrasound can be of benefit in many situations in the second and third trimesters, including but not limited to the following circumstances. ... read more »

hCG Levels and Pregnancy Test After Miscarriage

My pregnancy test was positive three weeks after miscarriage. ... read more »

Urine HPTs on First Missed Period Day

How accurate are urine home pregnancy tests (HPTs) on first day of a missed period? ... read more »

Non-Stress Test - NST

A nonstress test (NST) is a test done during the last three to four months of pregnancy in certain high-risk situations, usually to evaluate the fetus' health. ... read more »

Maternal Serum Screening

During a maternal serum screening the mother's blood is checked for a combination of different markers: alpha-fetoprotein (AFP), unconjugated estriol (uE3), and human chorionic gonadotropin (hCG). ... read more »

What is a Biophysical Profile Score?

The biophysical profile, or BPP, is a test that checks fetal health and it is usually done after the 24-26th week of the pregnancy. ... read more »

Fetal Health Monitoring

Women with high-risk pregnancies and those who experience other complications often need a close watch of the fetus for potential problems or complications. ... read more »

Amniocentesis: Signs of Problems

What are some of the signs? ... read more »

The Coombs Direct Antiglobulin Test In Pregnancy

The Coombs test or antiglobulin test is a blood test that looks for antibodies in your blood that are either free flowing (indirect Coomb test) or that may stick to your red blood cells (direct Coombs test)  and may cause red blood cells to die too early. ... read more »

Two Pregnancy Tests - Different Results

It is common to get 2 different results on two separate pregnancy tests, especially if done very early in pregnancy and on the same day. ... read more »

How Do You Do a Home Pregnancy Test?

There are many different types of home pregnancy tests (HPTs). Most drugstores sell HPTs over the counter. ... read more »

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