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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

Immune Deficiencies Many different immune system deficiencies require clinical care by a physician or other health care professional. Listed in the directory below are some, for which we have provided a brief overview. Severe Combined Immunodeficiency (SCID) Common Variable

Exercise: Before Starting an Exercise Program Talk with your provider It’s always important to talk with your healthcare provider before starting an exercise program. This is especially true if you currently have, or have had, any of the following: Diabetes Chest pain or pain in

Topic Index - Ear, Nose, and Throat Ear, Nose, & Throat Home Ear Disorders Anatomy and Physiology of the Ear Common Childhood External Ear Problems Otitis Externa (Swimmer's Ear) Foreign Bodies in the Ear, Nose, and Airway Otitis Media (Middle Ear Infection) Mastoiditis Hearing

Hormones During Pregnancy Many hormone levels are affected in the body during pregnancy. Several hormones play major roles during pregnancy. These are: Human chorionic gonadotropin hormone (hCG). This hormone is made only during pregnancy. It is made almost entirely in the

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 some pregnancy symptoms, like nausea and tiredness, can reduce your sex drive. So can visible changes in

Heart Defects Causing Extra Blood Flow Through the Lungs Click on the links below to learn more about these topics. Patent Ductus Arteriosus (PDA) Atrial Septal Defect (ASD) Ventricular Septal Defect (VSD) Atrioventricular Canal (AV Canal or AVC)© 2000-2026 The StayWell Company

Anatomy of the Prostate Gland Facts about the prostate gland The prostate gland is about the size of a walnut. It's located just below the bladder, and it surrounds the urethra. This is a tube that carries urine and semen out of the body. The prostate is partly muscular and