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13 Weeks Pregnant: Your Baby’s Development

The producers. Now that your little one has developed all of the critical body structures, the organs are hard at work. The liver secretes bile, the pancreas produces insulin, and the kidneys form urine to carry waste away (into the amniotic fluid). The urine is excreted into the amniotic fluid. Your little one's intestines, which have partially resided in the umbilical cord, have moved back into the abdomen now that there's enough room to accommodate them.

Head case. Your little one's head takes half of the total body length, thanks to all that brain development. Over the next few months, the body will grow at breakneck speed to catch up. When your baby is born, the head will be only a quarter of the total length.

embryo Week 13

13 Weeks Pregnant: Your Symptoms

Welcome to the second trimester! Many women describe the next few months as the honeymoon period of pregnancy. The discomforts of the first trimester — fatigue, nausea, frequent urination — ease up a bit and you finally start to enjoy being pregnant. Many women even feel a surge of energy during this trimester.

Middle management. One reason why you may feel pregnant is that your waistline is starting to thicken. As your regular pants are probably getting a little snug, you might feel more comfortable in those cute maternity outfits you've had your eye on. Whatever you decide, dress with comfort in mind.

13 Weeks Pregnant: Your Checklist

Look for some comfortable, stylish clothes to accommodate your baby bump

Enjoy the beginning of your second trimester, when you may have more energy and less nausea

Think about sharing your big news with your wider circle of family and friends

Sign up for weekly pregnancy tips

13 Weeks Pregnant: Your Checklist

Sign up for weekly pregnancy tips:

Look for some comfortable, stylish clothes to accommodate your baby bump

Enjoy the beginning of your second trimester, when you may have more energy and less nausea

Think about sharing your big news with your wider circle of family and friends

Sign up for weekly pregnancy tips:

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