Second trimester
Learning Center
COVID-19 vaccines for kids: What you need to know
Learn about the safety and effectiveness of COVID-19 vaccines for kids, the possible side effects, and the benefits of vaccination.
Balance exercises
Balance exercises can improve your balance and help prevent falls. See how they're done.
Bent penis
Learn what can cause a curved erection and when you may need to see a health care provider.
PSA levels: Can they rise after partial prostate removal?
A number of factors can cause PSA levels to rise after surgery for an enlarged prostate.
Palliative care
Learn what to expect with this care approach that offers symptom relief for seriously ill people of any age.
Penis pump
Find out how this device can be placed on your penis to create an erection.
Calcium supplements: A risk factor for heart attack?
Learn about the possible link between calcium supplements and heart attacks.
Bedsores (pressure ulcers)
These areas of damaged skin and tissue are caused by sustained pressure — often from a bed or wheelchair — that reduces blood flow to vulnerable areas of the body.
Withdrawal method (coitus interruptus)
The withdrawal method — pulling the penis out of the vagina before ejaculation — isn't the most effective birth control. Learn about the pros and cons.
Female fertility: Why lifestyle choices count
Know what you can do to protect being able to get pregnant.
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