Seafood in moderation is fine, but there are certain kinds of fish that should be avoided during pregnancy. Mackerel, swordfish and shark are very rich in mercury, an element that should only be taken in very small amounts while pregnant, as it has been linked to birth defects.

If your baby’s skin appears blue colored, it may be a sign that the lungs or heart are not working properly, and the baby should be seen by a doctor immediately. A newborn’s hands or feet may appear blue when cold, and should quickly return to pink when warmed. Also, the face, lips, or tongue may appear blue during a period of hard crying, but should return to pink once the crying has stopped.

A premature birth is a birth that takes place more than three weeks before the baby is due.

Because sperm can survive in the fallopian tubes for up to a week, you don't have to time sex to the exact moment you ovulate to get pregnant. This window includes the five days before and the day of ovulation itself.

Prolactinoma is the most common tumor of pituitary gland, comprising up to 45% of all pituitary tumors. Prolactinoma is the most common cause of hyperprolactinemia, which is a common cause of infertility in males and females.

These include the testes, where sperm is made, several ducts (tubes) where sperm is stored, and the penis. The penis has a single duct called the urethra; this releases both sperm and urine. Also included in the male reproductive system are the accessory sex glands, which include the prostate gland and seminal vesicles.