What to expect in your First Trimester of pregnancy | Pregnancy Week-by-Week

Congratulations! You are pregnant! Over the next eight weeks of your first trimester, your baby will grow from about the size of a poppy seed to a mushroom. And you’ll go through a lot of changes, too. This week-by-week guide to your first trimester will take you through all the developments, symptoms and things you need to start thinking about. (And don't miss our videos for your second trimester: and third trimester:

Here are the time codes to get to the topics that matter to you most right now, based on how many weeks pregnant you are:
0:13 - 4 weeks (Topics covered: Early symptoms of pregnancy, pregnancy hormones, nausea, bloating, exhaustion, implantation bleeding, precautions you need to take during pregnancy)
1:49 - 5 weeks (Topics covered: Pregnancy hormones, food cravings or aversions, morning sickness)
3:15 - 6 weeks (Topics covered: Constipation, alcohol consumption, how much caffeine you can have, dating ultrasound)
4:54 - 7 weeks (Topics covered: Growth of baby, dealing with nausea, pregnancy massage)
7:27 - 8 weeks (Topics covered: Picking a health care provider, miscarriage, nausea, what cleaning products are safe, acne, glossy hair)
9:48 - 9 weeks (Topics covered: Baby heart beat is strong enough to be heard, baby’s genitals are developing, pregnancy hormones, dealing with fatigue, maternity clothes, weight gain)
11:41 - 10 weeks (Topics covered: Fetal development, vivid dreams, growing uterus, pain medication that’s safe during pregnancy)
13:41 - 11 weeks (Topics covered: Fetal development, genetic testing, exercise during pregnancy)
16:34 - 12 weeks (Topics covered: Fetal development, risk of miscarriage, telling others about your pregnancy, maternity clothes)

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