PregnancyDevelopment, Care, Nutrition & What to Expect

Fetal Development

One of the most remarkable things about pregnancy is how quickly your baby grows. In just a few weeks, a cluster of cells becomes a beating heart.

Major organs begin forming during the first trimester. The second trimester brings noticeable growth and the first kicks. In the third trimester, growth and maturation prepare your baby for birth.¹

Understanding how your baby develops during pregnancy can help you feel more connected to the process and reassure you about what changes to expect at each stage.

You can explore trimester milestones, baby movement, and month-by-month development in our overview of Fetal Development.

Pregnancy Week by Week

Many parents find it helpful to follow pregnancy week by week. Each week brings new developments for your baby as well as physical and emotional changes for you.

In early pregnancy, symptoms like nausea, fatigue, and breast tenderness are common. As pregnancy progresses, you may notice changes in posture, sleep patterns, and appetite.²

It can help to take pregnancy one week at a time rather than trying to absorb everything all at once. Tracking weekly development can make pregnancy feel more manageable and help you prepare for upcoming milestones. Our Pregnancy Week-by-Week Overview and articles break down what to expect from week 1 through week 40.

Supporting a Healthy Pregnancy

Building healthy habits during pregnancy might feel overwhelming at first, but small, consistent choices can make a meaningful difference over time. Nutrition and overall health play an important role in supporting a healthy pregnancy.

Healthy pregnancy habits include:

• Taking a prenatal vitamin with folic acid³
• Eating a balanced diet rich in protein, fruits, vegetables, and whole grains
• Staying well-hydrated throughout the day
• Managing weight gain within recommended ranges
• Avoiding alcohol, tobacco, and other substances known to affect fetal development negatively

Folic acid is especially important in early pregnancy because it helps reduce the risk of neural tube defects.⁴ Other nutrients such as iron, calcium, vitamin D, and omega-3 fatty acids also support healthy development.

For more detailed guidance on nutrition, exercise, and healthy daily habits during pregnancy, visit our A Healthy Pregnancy overview page. Healthy habits during pregnancy benefit both you and your baby.

Prenatal Care

Prenatal care includes regular medical visits to monitor your health and your baby’s development throughout pregnancy.

During prenatal appointments, your healthcare provider may:

• Measure blood pressure
• Monitor weight gain
• Check fetal growth
• Listen to your baby’s heartbeat
• Discuss symptoms and any concerns you may have

Early and consistent Prenatal Care is strongly associated with healthier pregnancy outcomes.⁵ Building a trusting relationship with your healthcare provider will also help you feel supported and confident throughout pregnancy.

Tests to Support Your Pregnancy

Prenatal testing can provide information about your baby’s development and identify potential concerns.

Common tests include:

• Blood tests
• Ultrasounds
• Genetic screening
• Glucose screening for gestational diabetes

Some tests are routine. Others may be offered depending on your medical history, age, or individual risk factors.

Understanding why tests are recommended and when they are performed can help reduce anxiety and allow you to make informed decisions with your provider.

Explore Prenatal Screening Tests and Diagnostic Options. And if you have questions about testing, discussing them with your healthcare provider can help clarify what is most appropriate for your pregnancy.

Complications and Concerns

Most pregnancies progress normally. However, understanding possible complications and warning signs can help you respond quickly if concerns arise. Conditions such as gestational diabetes, preeclampsia, infections, or bleeding require medical attention.⁶

Seek immediate medical care if you experience any of the following.

• Severe abdominal pain
• Heavy bleeding
• Sudden swelling of face or hands
• Severe headaches
• Decreased fetal movement

Learning about potential complications does not mean expecting them. Rather, it allows you to recognize when medical guidance may be needed. You can explore our detailed information about Pregnancy Complications and Common Concerns.

Twins and Multiples

Pregnancy with twins or multiples may involve additional monitoring and specialized care.

Multiple pregnancies may increase the likelihood of certain complications, including preterm birth, gestational diabetes, or high blood pressure. Because of these factors, providers often recommend more frequent prenatal visits and ultrasounds to monitor both maternal health and fetal development.⁷ Your healthcare provider will develop a care plan specific to your situation.

If you are expecting twins or multiples, you can learn more about development and care in our page for pregnancies with Twin & Multiples.

Pregnancy Loss

Pregnancy loss can be a deeply painful experience, physically and emotionally. Miscarriage is common, especially in early pregnancy.⁸

Signs of possible miscarriage may include:

• Vaginal bleeding
• Cramping
• Passing tissue

If you experience any of these symptoms, contact your healthcare provider.

Grief after pregnancy loss is real, and there is no timeline for it. Some people feel ready to try again relatively quickly. Others need more time. Both are okay.

If you have experienced a loss, you do not have to process it alone. Support from your provider, a counselor, or others who have been through it can make a meaningful difference.

Find information on miscarriage, physical recovery, and emotional support for Pregnancy Loss. Or please feel free to call our FREE Pregnancy Helpline, where trained, live experts are available. Each conversation is completely confidential and always 100% free.

Frequently Asked Questions

How often should I see my doctor during pregnancy?

Most providers recommend visits every 4 weeks early in pregnancy, increasing in frequency during the third trimester.⁵

What weight gain is normal during pregnancy?

Weight gain recommendations depend on pre-pregnancy body mass index (BMI). Your provider can offer personalized guidance.⁹

Is exercise safe during pregnancy?

For most people, moderate exercise is safe and beneficial unless your provider advises otherwise.¹⁰

When should I feel my baby move?

Many people notice movement between 16 and 25 weeks. If you notice decreased movement later in pregnancy, contact your provider.

What happens after 40 weeks?

If pregnancy goes beyond 40 weeks, your provider may discuss additional monitoring or possible induction of labor.

Preparing for the Next Stage

As pregnancy progresses, many parents begin thinking about labor and delivery. If you would like to learn more about the birth process and your delivery options, you can continue exploring our comprehensive Giving Birth Guide.

If you are earlier in pregnancy and want to follow your baby’s growth in more detail, signing up for our Weekly Development Newsletter can help you track growth and changes you and your baby experience throughout the entire journey.

Or, if you are pregnant and wondering how this could have happened the Getting Pregnant Roadmap may be a helpful starting place. There’s nothing embarrassing about learning more.

A healthy pregnancy is not about perfection. You are not expected to know everything at once. With the right information and support, each step forward becomes more manageable. And, we are happy that you have chosen the American Pregnancy Association, a trusted resource for pregnancy information and support.