First trimester
Learning Center
Pinworm infection
Learn more about the symptoms, treatment and prevention of this common type of intestinal worm infection.
Placenta accreta
During pregnancy, if part of the placenta grows too far into the uterine wall, it can remain attached after childbirth, causing severe maternal blood loss.
Placental abruption
This uncommon pregnancy complication, in which the placenta separates from the wall of the uterus, can endanger both the mother and the baby.
Postpartum preeclampsia
Learn about this rare condition that's typically associated with pregnancy, but that can occur after delivery, too. Untreated, it can lead to serious complications.
Premenstrual syndrome (PMS)
Mood swings, cramps and irritability are just a few telltale clues that you're getting your period. Learn what you can do for PMS symptom relief.
Pulmonary valve stenosis
When the valve between the heart and lungs is narrowed, blood flow slows. Know the symptoms of this type of valve disease and how it's treated.
Rett syndrome
This rare genetic disorder affects the way the brain develops, causing a progressive inability to use muscles for eye and body movements and language.
Roseola
Learn about the causes of and home-care tips for this common viral infection that often affects children by age 2, causing a high fever followed by a rash.
Rubella
Learn more about the symptoms and prevention of this contagious viral infection best known for its distinctive red rash.
Scarlet fever
Learn more about the symptoms, causes, complications and treatment of this strep bacterial infection that causes a red rash, sore throat and high fever.
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