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Learning Center
Sperm: How long do they live after ejaculation?
After ejaculation, the life span of sperm depends on the circumstances.
Invasive lobular carcinoma
Breast cancer that begins in the milk-producing glands of the breast is uncommon. Learn what sets lobular carcinoma apart from other breast cancer types.
Video: How to use a dry powder disk inhaler
Watch these step-by-step instructions for using a dry powder disk inhaler.
Video: Keratoconus
Scleral contact lenses may be an alternative to surgery for many patients with keratoconus.
Which CPAP masks are best for you?
CPAP masks come in a variety of styles. See some of your options.
Exercise after pregnancy: How to get started
Exercising after pregnancy can give you the energy you need to care for your baby. Follow these strategies to stay safe and motivated.
Natural breast enhancement: Do supplements work?
Breast enhancement supplements haven't been proved effective and could cause side effects.
Pap smear: Do I need one if I'm a virgin?
Doctors recommend regular cervical cancer screening whether you've had sex or not.
Bacterial vaginosis
Learn about symptoms, treatments and prevention of this common vaginal condition.
Premenstrual dysphoric disorder: Different from PMS?
Extreme moodiness, intense sadness or marked irritability in the days before your period — along with your usual PMS symptoms — could be PMDD.
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