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Second Trimester Growth

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Now is when the fun starts. You're probably feeling better and your baby is rehearsing for his or her debut. He or she can pee, squint, frown, open and close his mouth, kick, and suck his thumb. The fetus's senses are sharpening, too. He or she could detect light and even hear your voice if outside your womb. By the end of this trimester, your baby could survive outside the womb with medical help, so breathe easier.

Second Trimester Highlights


Weeks 13-18: He's developing lanugo, a soft, fine hair, all over his lemon-sized body. Eyes move from the sides of the head toward the front. Soft cartilage is hardening into bone. If you're having a girl, her uterus and fallopian tubes are formed during this time. The prostate gland is developing in boys. Your baby may have frequent bouts of the hiccups.

Weeks 19-23: His lips, eyelids, and eyebrows are well-defined, and he's developing tiny tooth buds beneath his gums. The skin becomes less transparent. With an ultrasound, you can tell the sex now (if you want to know).

Weeks 24-27: He's beefing up and the added fat smoothes out wrinkled skin. Hair texture and color become noticeable. Tiny lungs are developing. He's looking and acting more like a newborn: sleeping and waking at regular intervals, opening and closing his eyes, and sucking fingers. By the end of this trimester, your baby will weigh almost two pounds and will be 14 1/2 inches long.

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