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Stages of Pregnancy Week by Week

Pregnancy Week 15

Find out how your baby is developing in week 15 as well as what tests you should ask your doctor about including a multiple marker screening test, an amniocentesis, and an Rh blood test.

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Month 4

Watch Your Baby's Growth

Second Trimester Begins: Weeks 13 to 17 of Pregnancy
Second Trimester Begins: Weeks 13 to 17 of Pregnancy

Here's to hoping you're no longer feeling nauseated or exhausted! Right now your baby's brain and eyes are making dramatic strides each day. Learn all about it.

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Your Changing Body

If you take a peek in the mirror, you might notice yet another set of strange pregnancy symptoms: Skin darkening -- most commonly around your nipples, areolas, navel, armpits and inner thighs -- affects more than 90 percent of moms-to-be. And if you have dark hair and fair skin, you're also more prone to a condition called chloasma.

Your Developing Baby

Lanugo, your baby's first ultrafine, downy hair, now covers his back, shoulders, ears, and forehead. It helps him retain body heat, but once he gains enough fat to do the job, this hair will fall off -- probably before birth. Facial expressions are your baby's newest trick -- he can frown, squint, grimace and wince.

Tip of the Week

Along with being known as the "feel good" trimester, trimester two is also considered the sexiest. Some women experience a boost in libido due to a hormonal change, and increased blood flow can also rev up arousal.

pregnancy exercise

Your Week 15 To-Do List

1. Sign up for a prenatal yoga class.

Week 15

An Inside Look

Take a unique look at Baby's development inside the womb this week.

Pregnant woman crossing off the days until the birth

Your Pregnancy Calendar

Organize your doctor's appointments, save your ultrasound photos, and more--all in one place!

Ask Parents About Week 15

We've got answers to your questions from experts and parents who've been there.

See All Questions or Ask Your Own

Everything in Pregnancy Week 15

More About Your Pregnancy in Week 15

Your Baby

Your Body

  • Amniocentesis

    Find out everything you need to know about amniocentesis: why you need the test, the risks and what to expect.

  • Multiple Marker Screening Test

    Find out what a multiple marker screening test is and why your doctor may suggest you have one.

  • Rh Incompatibility

    Learn about Rh compatibility in you and your baby's blood, and why you need to identify any possible incompatibilities early.

  • Varicose Veins

    Find out everything you need to know about varicose veins and what you can do to keep your legs healthy during pregnancy.

  • When Tests Indicate a Problem

    If your multiple marker screening test suggests there is an abnormality, it may be a false positive. Here's how to find out if there re...

Your Self

  • Mindful Walk

    Take a slow, thoughtful walk to relax your mind -- you'll get the same benefits as you would through meditation.

  • Prepping Siblings

    Help your children adjust to the thought of a new baby long before he's born.

  • Relaxation Techniques

    Stress is a normal part of life, but it's important to find ways to relax for the health of your baby.

  • The Ups and Downs of Sex

    Sex in your second trimester is an important way to stay connected to your partner.

Diet & Exercise

  • Craving Comfort Foods

    It's okay to give in to pregnancy cravings for comfort foods, but there are a few sneaky ways to skip some of the calories and fat.

  • Maintaining Strenuous Exercise

    You can still continue to exercise at a high level while pregnant -- just keep these safety tips in mind.

Q & A

First Trimester

Second Trimester

Third Trimester