Male fertility is measured by sperm quality and count. A man is considered at risk for infertility if his sperm count is less than 20 million per millilitre, and may be sterile if the sperm count is less than 500,000 per millilitre. Semen analysis is commonly done by light microscope and scanning electron microscope. Female infertility has become a medical hot topic, but what about men; the other half of the equation?

Morning sickness, also known as nausea gravidarum, affects up to 80% of pregnant women. Nausea and vomiting are usually limited to the first seven to twelve weeks of pregnancy, but can go on for longer in some women.