1st trimester: Week 11

The rib cage and eyelids begin to close to protect the heart and eyes.

Your Baby

Your little one is roughly the size of a thumb this week, but he can swallow and kick, and his fingernails have started to grow. His head is so big it takes up almost half the length of his body, and a clear outline of his spine is visible. If you have an appointment with your doctor or midwife this week, she'll be able to pick up the speedy swoosh of a heartbeat with the help of a special stethoscope called a Doppler. Experts say hearing a heartbeat at this point is a major sign that the pregnancy is progressing as it should.

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Your Body

Your uterus, now the size of a grapefruit, has expanded to fill your pelvis. The umbilical cord spirals as two arteries and a vein twist to fit into the protective sheath holding them. The umbilical cord feeds your baby all that he needs and works with the amniotic fluid to keep him safe.

Your Pregnant Body:

Do's and Don'ts

Do sleep on your side as often as possible, as experts say this position increases blood flow to the baby. A body pillow, which you can order at maternity stores, can help make side-sleeping more comfortable. It also provides such snug support that some who've tried it can't live without it.

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Health

Felled by the flu? Before you reach for that bottle of over-the-counter medicine, run it by your doctor. Acetaminophen (the ingredient found in Tylenol) and many antacids are generally okay, but cough syrups, cold remedies, and other products may have ingredients that can harm a developing baby. Never use ibuprofen during your pregnancy.

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