A medical procedure involving the removal of a small tissue sample for examination under a microscope. In the context of fertility, a testicular biopsy may be performed to retrieve sperm directly from the testes.
Abecedario: B
Blastocyst
An advanced stage of the embryo, usually reached 5-6 days after fertilization, at which the embryo has about 100-200 cells and is ready for implantation in the uterus.
