Week by Week: Pregnancy Week - 28

How your baby's growing:

By this week, your baby weighs 2 1/4 pounds (about the size of a large eggplant) and measures 14.8 inches from the top of her head to her heels.

She can blink her eyes, which now sport lashes. With her eyesight developing, she may be able to see the light that filters in through your womb. She's also developing billions of neurons in her brain and adding more body fat in preparation for life in the outside world.

See what your baby looks like this week. (Or see what fraternal twins look like in the womb this week.)

Note: Every baby develops a little differently — even in the womb. Our information is designed to give you a 

How your life's changing:

You're in the home stretch! The third and final trimester starts this week. If you're like most women, you'll gain about a pound per week this trimester.

At this point, you'll likely visit your doctor or midwife every two weeks. Then, at 36 weeks, you'll switch to weekly visits.

Depending on your risk factors, your practitioner may recommend repeating blood tests for HIV and syphilis now, as well as doing cultures for chlamydia and gonorrhea, to be certain of your status before delivery. Also, if your glucose screening test result was high and you haven't yet had follow-up testing, you'll soon be given the 3-hour glucose tolerance test.

And if the blood work done at your first prenatal visit showed that you're Rh negative, you'll get an injection of Rh immunoglobulin to prevent your body from developing antibodies that could attack your baby's blood. (If your baby is Rh positive, you'll receive another shot of Rh immunoglobulin after you give birth.)

Around this time, some women feel an unpleasant "creepy-crawly" sensation in their lower legs and an irresistible urge to move them while trying to relax or sleep. If this sensation is at least temporarily relieved when you move, you may have what's known as restless legs syndrome (RLS).