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Pregnancy Click on the links below to learn more about this topic. Pregnancy Overview Anatomy: Fetus in Utero The First Trimester (0 - 12 Weeks) The Second Trimester (12 - 24 Weeks) The Third Trimester (24 - 40 Weeks) The Pregnant Mother Hormones During Pregnancy Weight Gain

Allergens: Dust and Dust Mites What are dust allergens? Dust allergens are substances found in dust. They may include: Fabric fibers Lint Feathers Stuffing materials Animal protein (dander, saliva, urine, and body oils) Bacteria Mold and fungus spores Food particles Plants

Sex During Pregnancy In most cases, sex during pregnancy is safe. In fact, with your healthcare provider's OK, you can have sex until delivery. But changing hormone levels and sone pregnancy symptoms, like nausea and tiredness, can reduce your sex drive. So can visible changes in

Anatomy of the Breasts Each breast has 15 to 20 sections, called lobes. They are arranged like the petals of a daisy. Each lobe has many smaller structures called lobules. These end in dozens of tiny bulbs that can make milk. The lobes, lobules, and bulbs are all linked by thin

The Thyroid Gland Anatomy of the thyroid gland The thyroid gland is found in the front of the neck. It sits below the voice box (larynx) and on top of the trachea (windpipe). It has a butterfly-like shape. The small, 2-inch gland consists of 2 lobes, 1 on each side of the

Cystic Fibrosis and the Digestive System How does CF affect the digestive system? Children with cystic fibrosis (CF) have a protein in their cells that doesn't work right. The protein is called CFTR (the cystic fibrosis transmembrane regulator). CFTR controls the flow of water

Uniparental Disomy: Prader-Willi Syndrome and Angelman Syndrome What is uniparental disomy? Chromosome pairs affect how our body works. Normally, a baby gets 1 copy of each chromosome pair from each parent. This means 1 copy from the genetic mother, and the other copy from the

Allergens: Pollen What is pollen? Pollen is the tiny egg-shaped male cells of plants, including trees, grasses, and weeds. Pollen is microscopic in size. It is the most common cause of hay fever (seasonal allergic rhinitis). Which plants produce pollen that cause allergic

Trinucleotide Repeats: Fragile X Syndrome What are trinucleotide repeats? DNA is the chemical that makes up your genes. It contains a "code" of 3-letter words known as codons or trinucleotides. Many genes normally contain trinucleotide sequences that repeat. These are called

Anatomy of the Eye Anterior chamber. The front section of the eye's interior where aqueous humor flows in and out, providing nourishment to the eye. Anterior chamber. The front section of the eye's interior where aqueous humor flows in and out, providing nourishment to the eye