Birth control pills
Learning Center
Birth control pills: Harmful in early pregnancy?
If you took birth control pills before you knew you were pregnant, the risks of birth defects are low.
Blood clots during menstruation: A concern?
Blood clots during menstrual periods aren't always a cause for a concern. But passing large clots may be a sign that something is wrong.
Bioidentical hormones: Are they safer?
There's no evidence that bioidentical hormones are safer than standard hormone therapy for menopause.
Birth control: Can preejaculation fluid cause pregnancy?
This possible cause of pregnancy makes withdrawal a method of birth control you cannot rely on.
Flu shot in pregnancy: Is it safe?
Will you be pregnant during flu season? A flu shot is safe — and it protects both you and your baby.
Falling during pregnancy: Reason to worry?
Here's what to consider after a fall during pregnancy, including when to seek medical help.
Aspirin during pregnancy: Is it safe?
A Mayo Clinic specialist explains what you need to know about taking aspirin if you're pregnant.
X-ray during pregnancy: Is it safe?
Learn when an X-ray during pregnancy might cause harm and how to avoid it.
Sperm: How long do they live after ejaculation?
After ejaculation, the life span of sperm depends on the circumstances.
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