How your immune system changes during pregnancy.

The opening between baby’s stomach and esophagus is not fully matured at birth, so food can back up more easily. Called acid reflux, it is occasional and temporary. Learn how to recognize it and what you can do to help baby deal with it. Learn more at yourpregnancyweekbyweek.com.

Carrying baby in a carrier close to you can be a lifesaver. One group, called soft infant carriers, includes soft-structured carriers, slings and wraps. We discuss the different types and the pros and cons of each. Learn more at yourpregnancyweekbyweek.com.

There may be many causes of headaches during pregnancy. Learn about the different kinds of headaches you can experience and how to deal with them, including migraines. Learn more at yourpregnancyweekbyweek.com.

Discomforts of pregnancy may impact your sleep. To get a good night’s sleep, you need to know what you can do and where to make changes. Find out what you can do for a better night’s sleep. Learn more at yourpregnancyweekbyweek.com.

If you believe your baby is overweight, discuss it with baby’s doctor. Learn what you can do to help baby achieve a healthy weight. Learn more at yourpregnancyweekbyweek.com.

To be a good parent in a couple relationship, you need to work together. Discover ways to support each other with respect and consideration. Learn more at yourpregnancyweekbyweek.com.

Your immune system changes to adapt to your pregnancy. Find out how and when it changes to protect you and baby. Learn more at yourpregnancyweekbyweek.com.

With a food allergy, baby’s immune system reacts against certain food proteins as if they were germs. Examine what symptoms may be, how to deal with them and steps to take to avoid or manage food allergies in your baby. Learn more at yourpregnancyweekbyweek.com.

An elective delivery is scheduling a birth for a nonmedical reason before 39 weeks of pregnancy. Learn about the reasons for, and the warnings against, this practice. Learn more at yourpregnancyweekbyweek.com.

A multiple-marker test is a prenatal screening blood test that helps identify whether baby may have certain types of birth defects. It measures markers found in your blood, which are produced by the fetus and the placenta. Learn more about what the tests measure. Learn more at yourpregnancyweekbyweek.com.