Fetal Development Guide: Heartbeat, Size & Trimester Tips

Fetal growth follows a precise timeline, from the first heartbeat to the final stages of brain development. Proper nutrition delivered through the placenta is vital for maintaining healthy fetal weight and overall wellness.

Pregnant women holding her belly.

How Do Babies Breathe in the Womb?

Your unborn baby does not breathe through her mouth and nose while she is in the womb. Until her exit from the womb, your baby develops in an environment filled with amniotic fluid.

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Pregnant belly

Pregnancy at 37 Weeks

At 37 weeks, a pregnancy is full term--if the baby is born now, it will not be premature. Ideally, however, the pregnancy will continue until 40 weeks. This final stage of the pregnancy may be difficult. The cumulative weight gain may make the mother uncomfortable, even while sitting or lying down.

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Chinese pregnant woman,China

Problems During the First Trimester of Pregnancy

The first trimester of pregnancy lasts from fertilization to the 13th week. During this time the embryo will implant, form the fetal part of the placenta and develop all its organs. Your body will pump out hormones and produce more blood cells to support the pregnancy.

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Emotional Symptoms During Third Trimester of Pregnancy

The third trimester of pregnancy lasts from week 28 until delivery. During this time the baby is growing and gaining weight rapidly. There are many physical and emotional experiences that occur during the last months of pregnancy.

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Slim woman isolated on white background

What Are Signs of Pregnancy at 13 Weeks?

At the end of your 13th week of pregnancy you are at the beginning of your second trimester. Your baby is almost 3 inches long and weighs almost an ounce, according to Baby Center. It is important to realize that not all women experience the same symptoms at the same time.

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Waiting for a baby.

What Does My Unborn Baby Look Like at 6 Weeks?

Week 6 of pregnancy is considered early pregnancy and is about halfway through the first trimester. Some women find out they are pregnant around this time. Babies at this stage can be measured with an ultrasound, although many details may be difficult to see.

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7 Months Pregnant Symptoms

At seven months (28 weeks) into your pregnancy, you are in the first week of your third trimester and about 12 weeks from your due date. By this week, your baby weighs 2 1/4 pounds (about the size of a Chinese cabbage) and measures 14.8 inches from the top of her head to her heels, reports BabyCenter.

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Signs of Pregnancy a Week After Conception

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.

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Pregnant woman holding headphones to stomach

Risks in First Trimester of Pregnancy

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.

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Pains to Expect Within First Trimester of Pregnancy

During the first trimester (or first three months) of pregnancy, changing hormone levels begin to transform a woman’s body in ways that help to support the growing fetus and physically prepare the mother for childbirth.

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Pregnancy

The Advantages of Checking a Baby's Heartbeat

Checking the fetal heart rate gives important clues into an unborn baby’s health and well being. Even as early as 6 weeks into a pregnancy, assessing the fetal heartbeat can help doctors determine if potential problems with the pregnancy exist.

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Cropped pregnant woman measuring waist

How Much Bigger Will My Belly Get Every Week in Pregnancy?

Watching your belly grow as your baby develops is one of the many joys of being pregnant. However, the state of your belly also can be a source of concern, particularly if your belly starts showing much faster than a pregnant friend’s belly or you aren’t showing at all into your fifth month.

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Husband listening to his wife's belly

How Much Fetal Movement Should You Feel at 18 Weeks Pregnant?

Pregnant women eagerly anticipate feeling their baby's first movements. However, since perceptions of fetal movement can vary widely, you might worry that the amount of movement you feel at 18 weeks indicates that something is wrong -- whether you feel a lot of movement or none at all.

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Expectant mother with headphones on her belly

Can Loud Noises Hurt an Unborn Baby?

When you are pregnant, exposure to loud noises can raise the risk of hearing problems and other health issues not only for you, but also for your unborn baby. Loud noises can come from a variety of sources, including airplane engines, rock concerts, workplace-associated noise or a car radio played at a high volume.

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Is It OK to Drink Coffee in the Third Trimester?

Caffeine is a stimulant that causes increased heart rate and blood pressure. It also acts as a diuretic, causing increased urination, which can lead to dehydration. Coffee and other caffeinated foods also cause heartburn for some women.

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Pregnant woman lying in bed

Can Sleeping on My Stomach Harm My Unborn Baby?

Sleeping on your stomach puts pressure on your unborn baby. If it's early in your pregnancy or you're simply trying to conceive, you should try to get in the habit of sleeping on your side, so when you are further along, sleeping this way comes naturally.

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