A method of contraception, also called coitus interruptus, in which the man withdraws his penis from the vagina before ejaculation. Fertilization is prevented because the sperm do not enter the vagina.
The effectiveness of this maneuver depends on the man’s ability to withdraw before the ejaculation of any sperm.
Withdrawal does not provide protection from sexually transmitted diseases (STDs) such as HIV. Infectious diseases can be transmitted by direct contact with surface lesions and by pre-ejaculatory fluid.
This approach to birth control will most likely fail and the woman to become pregnant. This is not a recommended form of contraception.
- Witkop syndrome
A genetic disorder characterized by the absence of several teeth at birth and abnormalities of the nails. The disorder is also known as hypodontia and nail dysgenesis or, more picturesquely, as the tooth and nail syndrome (TNS). The tooth and nail defects in the syndrome are highly variable. The number and type of congenitally missing […]
Medical shorthand for white male.
Medical shorthand for within normal limits. For example, a laboratory test result may be WNL.
- Wolf-Hirschhorn syndrome
Abbreviated WHS. A chromosome disorder due to partial deletion of the short (p) arm of chromosome 4. It is therefore also called the 4p- syndrome. Features of the syndrome include midline defects with a scalp defect, widespaced eyes, broad or beaked nose, oral facial clefts (cleft lip/palate); low simple ears with a dimple in front […]
- Wolff-Parkinson-White syndrome
A condition that is caused by an abnormality in the electrical system of the heart, which normally tells the heart muscle when to contract. Abbreviated WPW syndrome. In WPW syndrome there is an extra electrical connection inside the heart that acts as a short circuit, causing the heart to beat too rapidly and sometimes in […]