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Types of psoriasis
Learn to identify types of psoriasis, such as guttate psoriasis and scalp psoriasis, by appearance.
Article
Types of dermatitis
Learn to identify types of dermatitis by how the skin looks. Examples include atopic dermatitis, contact dermatitis and seborrheic dermatitis.
Article
Video: Ovulation
Ovulation — the release of an egg from an ovary — occurs about midway through the menstrual cycle. See how it happens.
Video
Placenta: How it works, what's normal
Understand how this pregnancy organ works and what conditions can affect it.
Article
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