Many pregnant women have wished for a window into the uterus, to reassure themselves that their baby-to-be is healthy. Ultrasound provides such a window and there are several signs of a healthy pregnancy that appear in the first seven weeks of pregnancy on ultrasound.

Many newly pregnant women wonder, “Is it twins?” Although twin pregnancies are more easily identified later in pregnancy, even at the time of the first missed period, or 4 weeks of pregnancy, there may be clues that more than one baby is on the way. Some signs are definitive, but others are only suggestive.

For many women anxious to find out if they are pregnant, waiting until a positive pregnancy test is possible is just unbearable. Although many signs of pregnancy do not appear until weeks after conception, there are a few signs that can occur as soon as a week after conception in some women.

For expecting moms, an approaching due date brings emotions ranging from excitement to anxiety to fear. Since it's no secret that babies aren't always born on the day they're expected to, it's important for pregnant women to watch for signs that labor will soon begin.

Morning sickness may occur in about one-third of pregnant women. It does not cause medical problems to the baby as long as the mother does not lose too much weight due to vomiting. Morning sickness will typically begin in the first month of the pregnancy and will generally last up to the fourth month.

Many pregnancies end in miscarriage before a women even knows she’s pregnant. A full-term pregnancy is measured as 40 weeks, starting with the first day of the last menstrual period. At five weeks of pregnancy, a woman is one week past her first missed period.

It is estimated that up to 25 percent of all pregnancies may end in miscarriage in the first trimester. There are some signs and symptoms of possible miscarriage. It is important to realize, however, that many women who experience some, or even all, of these symptoms may go on to have a healthy baby.

Pregnancy is not a medical emergency, in most cases. Outside of well-established labor, times when a pregnant woman must go to the hospital rather than calling her obstetrician are rare. However, medical emergencies do occur in pregnancy, and when they do, time is of the essence.

At 28 weeks into your pregnancy, you are well into your second trimester. Most women report feeling wonderful around this time. The nausea, fatigue and breast tenderness have probably subsided. During the second trimester, you will notice symptoms that are much more physical in nature.

Even though pregnancy signals an increase--and menopause results from a decrease--in hormones, they result in a few similar symptoms. Most women of child-bearing age will not stop to think that their symptoms might mean menopause.

The first trimester, or three months, of pregnancy, can present many risks to the developing fetus. Because organs, facial features, skeletal tissue and limbs are developing at this time, any negative affect on the fetus can result in serious birth defects.

The first trimester of your pregnancy is a period of rapid development for your baby. You should be extremely cautious taking any type of medication, unless you know it is considered safe. Most women try to use non-pharmacological methods before using medication. However, sometimes medications are necessary.