Medical Glossary: Y

Yeast Infection

Called either monilia vulvovaginitis or candidiasis, it is any infection caused by the bacteria Candida, usually Candida albicans. Common manifestations are diaper rash, intertrigo, vaginitis and thrush. Oral and topical medication can be used for treatment.

Yolk Sac

The structure that is attached to the embryo and provides initial nourishment until about the 7th week when it disappears.

The cells of the yolk sac (extraembryonic mesoderm) differentiate to develop early blood cells including the endothelium, primitive plasma and hemoglobin.

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