About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
GI System
Female Reproductive System Issues
Climate has cooled substantially during primate evolution.
Woolly Mammoth Skeleton
Principle Structures of the Limbic System
The respiratory system and the process of gas exchange