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Your baby is busy somersaulting and stretching, but they're still too small for you to notice it. You probably won't feel your baby move until you're at least 16 weeks pregnant.
Create a time-lapse record of your pregnancy by documenting your growing bump every week. You can take selfies or ask your partner or a friend to take photos.
If you haven't spilled the beans yet, start thinking about how you'll let family and friends know you're expecting. Pregnancy announcements range from a group text message to an elaborately staged photo or big reveal.
You're in your third month!
Your baby's tiny fingers and toes have lost their webbing and are distinct – and longer.
As you reach the end of the first trimester, all your baby's vital organs are in place, and many have already started to function. The liver is making red blood cells, kidneys are making urine, and the pancreas starts making insulin. The four chambers of your baby's heart are fully formed, and your baby's heart is beating.
By the end of this week, your baby's genitals will start developing. The external sex organs – the penis and scrotum in boys, the clitoris and labia in girls – don't start to differ from each other until about 11 weeks. And even then, it takes several more weeks to be able to easily see the difference between boys and girls on an ultrasound.
Constipation, gas, and bloating are all common during pregnancy due partly to hormonal changes, which can slow digestion. To keep things moving, sip water throughout the day, eat high-fiber foods (like fresh fruits and vegetables), and exercise to keep things moving.
You may begin to feel heartburn (also called acid indigestion), a burning sensation that often extends from the bottom of your breastbone to your lower throat. Many women get heartburn for the first time during pregnancy or find that it gets worse. To reduce heartburn, don't lie down after you eat; avoid foods that are fatty, spicy, fried, or highly seasoned; eat smaller meals; and don't drink too many liquids with your meals.
There's no way around it, your life changes profoundly when you have a baby. You may be excited for the changes, slightly nervous, or anxious – depending on the day. Be sure to prioritize rest, plan healthy meals, exercise safely, and share your feelings with someone you trust. By taking care of yourself, you're also taking care of your baby.
Pregnancy fatigue is probably still going strong. Hang in there, you may feel a big burst of energy soon when you get to your second trimester. Keep your strength up by eating nutritious pregnancy snacks, going to bed earlier, taking naps, and cutting out unnecessary tasks and commitments.
Increased levels of estrogen might lead to more vaginal discharge in your underwear. Healthy discharge is clear to milky-white and mild-smelling. Call your doctor or midwife if your discharge has an unpleasant smell; causes pain or itching; or appears gray, yellow, or green.
Both food cravings and the opposite – food aversions – are common and normal during pregnancy. It's estimated that about 60 percent of pregnant women have food aversions, likely due to hormonal changes and a heightened sense of smell. It's possible that your appetite could be out of whack until your baby is born, but typically food aversions (like morning sickness) go away in the second trimester.
Headaches in the first trimester are often caused by hormonal changes, stress, congestion, allergies, lack of sleep, or dehydration. Some women have a migraine headache for the first time while pregnant, though many women who are prone to migraines find these actually improve during pregnancy. Exercising, watching out for headache triggers, and taking acetaminophen (with your healthcare provider's okay) are some safe ways to avoid and treat pregnancy headaches.
Wondering about a symptom you have? Find it on our pregnancy symptoms page.
Don't worry if nausea has made it impossible for you to eat well or if you haven't put on much weight yet. If you start at a healthy weight, experts recommend gaining 1 to 5 pounds during the first trimester. Some women gain more than this in the first trimester, though – sometimes because they can only stomach less-healthy foods. If you're concerned, use our pregnancy weight gain calculator and talk to your doctor or midwife.
Moms and expecting moms can offer advice and a deep understanding of what you're going through. Reach out to moms you know and ask about their pregnancy experiences. You can meet expecting moms online in your BabyCenter Birth Club and in your community through prenatal yoga and parenting classes.
A babymoon is a last-hurrah vacation you take during pregnancy. You may want to stay close at a hotel across town, or you might be itching to check off a bucket-list destination. Many expecting moms prefer to travel in their second trimester when they have the most energy. Read more about babymoon destination ideas, do's and don'ts, safety tips, and what to pack.
You'll be going to a lot of prenatal appointments: They're typically every four weeks in the first and second trimesters, and even more often in the third trimester. One pro tip: Schedule your checkups for first thing in the morning or the first appointment after lunch. There's no backlog of patients to get through, so you're less likely to wait.
Getting enough calcium is crucial during pregnancy. Your baby needs calcium for strong bones, teeth, nerves, and muscles. If you don't get enough calcium in your diet during pregnancy, your baby will draw it from your bones! Plus, adequate calcium levels can reduce your risk of some serious pregnancy complications. Women 19 and older need 1000 mg of calcium a day. You'll get some from your prenatal vitamin, but it's important to also have calcium-rich foods like milk and other dairy products; canned fish; and calcium-fortified cereal, juice, soy milk, and bread. Talk to your provider about adding a calcium supplement if you don't think you're getting the recommended amount.
Though the "pregnancy glow," is real, it often doesn't kick in until later in pregnancy. And pregnancy also brings its fair share of skin issues. You may develop acne, varicose veins, melasma, rashes, itchy skin, or stretch marks. Some of these can't be avoided – but you can help your skin by drinking plenty of water, wearing sunscreen, and moisturizing frequently.
If you don't notice a bump yet, don't be concerned. Every woman and every baby bump is different, and there isn't an exact time when pregnancy starts showing. You'll start looking noticeably pregnant when your growing uterus begins to expand above the pubic bone, which may happen when you're around 12 weeks pregnant at the earliest, but often a few weeks later. Before 12 weeks, the uterus remains within the pelvis and isn't usually visible.
The size of your belly depends on the position of your uterus in your body, your height and weight, and whether you've had a baby before. Moms often start showing with a second pregnancy sooner, since their uterine and abdominal muscles have been stretched from their earlier pregnancy.
Marcella Gates is executive editor at BabyCenter, the world's number one digital parenting resource, and is an expert on pregnancy and parenting. As a mom of three, she loves that her professional life is focused on supporting and empowering parents and expecting parents. Gates lives in the San Francisco Bay Area with her family.
