Fitness basics
Learning Center
Birth control: Can preejaculation fluid cause pregnancy?
This possible cause of pregnancy makes withdrawal a method of birth control you cannot rely on.
Vitamin D deficiency
What are the risks of too little vitamin D?
Ovulation signs: When is conception most likely?
Trying to get pregnant? Learn about symptoms of ovulation
Pap smear: Do I need one if I'm a virgin?
Doctors recommend regular cervical cancer screening whether you've had sex or not.
Early miscarriage: Is stress a factor?
Early miscarriage is usually caused by an abnormality with the baby — not maternal stress.
Leg cramps during pregnancy: Preventable?
A Mayo Clinic specialist shares prevention and treatment tips for leg cramps during pregnancy.
Vitamin D deficiency: Can it cause high blood pressure?
Too little vitamin D is bad for the bones, but what about the heart? Learn how a low vitamin D level may affect blood pressure.
Extended-cycle birth control pills: Is spotting common?
Breakthrough bleeding is more common with continuous and extended-cycle birth control pills, but usually decreases with time.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Sperm: How long do they live after ejaculation?
After ejaculation, the life span of sperm depends on the circumstances.