A Terms

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Atresia
The process by which cells regress, die, and subsequently get resorbed by the body. The absence of a normal opening or channel within the body. ... Read More
Atrial Septal Defect (ASD)
A birth defect characterized by a hole between the upper two chambers (atria) of the heart. When the baby is in the womb, there must be a ... Read More
Attenuated or weakened vaccines
Vaccines such as polio are included in this type of immunization. These are such as polio, are engineered to be less virulent than the disease ... Read More
Autism
A condition manifested by difficulty in establishing relationships and responding to the environment. The child is often very ... Read More
Azoospermia
The absence of sperm. This rarely occurs except in men who have had chemotherapy or radiation therapy for malignancy. It is a cause of male ... Read More
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