Glossary of Terms

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Z

Zithromax

This is the antibiotic generally known as azithromycin. It is very similar to Erythromycin but can be given in a single dose instead of a ten day course. It is used to decrease the chances that the bacteria ureaplasma or mycoplasma may inhabit the uterine cavity, which could result in decreased chances of embryo implantation. 

Zona Pellucida

A translucent noncellular layer, which surrounds the egg and embryo. Just prior to implantation the zona will be broken and the embryo released to implant in the endometrium. In some women, especially in women over the age of 37, the zona is thicker and therefore harder for the embryo to hatch. Assisted hatching is then employed to help the embryo in this process.

Zygote

A fertilized egg.