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Immune Deficiencies Many different immune system deficiencies require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overview. Severe Combined Immunodeficiency (SCID) Common Variable

Anatomy of the Breasts Each breast has 15 to 20 sections, called lobes. They are arranged like the petals of a daisy. Each lobe has many smaller structures called lobules. These end in dozens of tiny bulbs that can make milk. The lobes, lobules, and bulbs are all linked by thin

Eye Care Specialists What is an ophthalmologist? An ophthalmologist is either a medical doctor (MD) or an osteopathic doctor (DO). They provide complete eye care. This includes exams, diagnosis, and treatment for many eye disorders. They are skilled in all types of eye care. They

Sleeping Positions During Pregnancy As your pregnancy progresses and your uterus gets bigger, you may find it harder to get comfortable in bed. Early on in pregnancy, you can sleep on your stomach. Over time, that position can become uncomfortable. But it's OK to sleep on your

Smoking and Pregnancy The risks involved with smoking during pregnancy Fewer women are smoking during their pregnancy now than in the past. But many women still smoke. Even if a pregnant woman doesn't smoke, she may be exposed to secondhand smoke at home, at work, or in social

Symptoms and Diagnosis of Multiple Pregnancy What are the symptoms of multiple pregnancy? Each woman may have slightly different symptoms. But the most common symptoms of multiple pregnancy are: Uterus is larger than expected for the dates in pregnancy More morning sickness

Calculating a Due Date A typical pregnancy lasts, on average, 280 days, or 40 weeks—starting with the first day of the last normal menstrual period as day 1. An estimated due date can be calculated by following steps 1 through 3: First, determine the first day of your last

Topic Index Planning a Pregnancy Prenatal Medical Care Pregnancy Common Discomforts of Pregnancy Common Tests During Pregnancy Risks to Pregnancy Warning Signs During Pregnancy Labor and Delivery Breastfeeding Your Baby Bottle-Feeding Click on the links above to learn more about

Recognizing Gynecologic Problems Gynecological symptoms that may need medical attention Vaginal bleeding and discharge are a normal part of your menstrual cycle before menopause. But, if you notice anything different or unusual, talk to your healthcare provider. Don't try to

Overview of Neck Masses in Children What are neck masses? Neck lumps (masses) are common problems in babies and children. Some neck masses are present at birth (congenital). They result from abnormal formation that occurs in the early stages of an unborn baby's development. Many